Waves and Optics

Properties of Waves - Wave properties in real-life situations

By the end of the lesson, the learner should be able to:

- Define wave properties including rectilinear propagation, reflection, refraction, diffraction and interference
- Identify examples of wave properties in everyday life
- Relate wave properties to real-life applications such as mirrors, lenses and sound systems

In groups, learners are guided to:

- Brainstorm on what was learnt in Grade 9 about waves
- Use digital devices or reference books to search for the meaning of wave properties
- Copy and complete a table showing wave properties and their applications
- Present findings on properties of waves in a class discussion

How do wave properties affect our daily experiences with light and sound?

- Triumph Physics 10 pg. 139
- Digital devices
- Reference books
- Writing materials

- Oral questions - Observation - Written assignments

Waves and Optics

Properties of Waves - Demonstrating wave properties using a ripple tank

By the end of the lesson, the learner should be able to:

- Identify the parts of a ripple tank and state their functions
- Set up a ripple tank for wave demonstration
- Connect wave patterns observed in a ripple tank to natural phenomena like water waves at the beach

In groups, learners are guided to:

- Observe a ripple tank and its components
- Label key parts of the ripple tank
- Copy and complete a table showing parts and functions of a ripple tank
- Fill the tank with water and test wave generation

What role does each part of a ripple tank play in demonstrating wave behaviour?

- Triumph Physics 10 pg. 141
- Ripple tank with components
- Bar and ball dippers
- Light source
- White screen

- Observation - Oral questions - Practical assessment

Waves and Optics

Properties of Waves - Demonstrating wave properties using a ripple tank

By the end of the lesson, the learner should be able to:

- Identify the parts of a ripple tank and state their functions
- Set up a ripple tank for wave demonstration
- Connect wave patterns observed in a ripple tank to natural phenomena like water waves at the beach

In groups, learners are guided to:

- Observe a ripple tank and its components
- Label key parts of the ripple tank
- Copy and complete a table showing parts and functions of a ripple tank
- Fill the tank with water and test wave generation

What role does each part of a ripple tank play in demonstrating wave behaviour?

- Triumph Physics 10 pg. 141
- Ripple tank with components
- Bar and ball dippers
- Light source
- White screen

- Observation - Oral questions - Practical assessment

Waves and Optics

Properties of Waves - Rectilinear propagation of waves

By the end of the lesson, the learner should be able to:

- Explain rectilinear propagation of waves
- Demonstrate rectilinear propagation using a ripple tank
- Connect rectilinear propagation to shadow formation and pinhole cameras

In groups, learners are guided to:

- Set up a ripple tank with bar and ball dippers
- Generate straight and circular waves and observe their propagation
- Sketch wave patterns and label direction of travel
- Discuss applications of rectilinear propagation

Why do waves travel in straight lines perpendicular to the wavefront?

- Triumph Physics 10 pg. 143
- Ripple tank
- Bar and ball dippers
- Manila paper
- Markers

- Practical assessment - Observation - Written assignments

Waves and Optics

Properties of Waves - Reflection of waves

By the end of the lesson, the learner should be able to:

- State the law of reflection
- Demonstrate reflection of waves using different shaped barriers
- Relate wave reflection to everyday applications like mirrors, periscopes and acoustic design

In groups, learners are guided to:

- Generate plane waves and observe reflection off straight barriers
- Measure and compare angles of incidence and reflection
- Observe reflection patterns using concave and convex barriers
- Sketch wave patterns before and after reflection

How does the shape of a barrier affect the reflection pattern of waves?

- Triumph Physics 10 pg. 144
- Ripple tank
- Metal barriers (straight, concave, convex)
- Ruler
- Manila paper

- Practical assessment - Observation - Oral questions

Waves and Optics

Properties of Waves - Refraction of waves

By the end of the lesson, the learner should be able to:

- Explain refraction as bending of waves due to change in speed
- Demonstrate refraction of waves in a ripple tank
- Connect refraction to how lenses work in eyeglasses, cameras and microscopes

In groups, learners are guided to:

- Place rectangular plastic sheets to create shallow water regions
- Observe how wave speed and direction change at boundaries
- Sketch wave patterns showing refraction
- Discuss why sound travels farther at night than during the day

Why do waves bend when they move from one medium to another?

- Triumph Physics 10 pg. 147
- Ripple tank
- Clear plastic sheets (rectangular and convex)
- Manila paper
- Markers

- Practical assessment - Written assignments - Observation

Waves and Optics

Properties of Waves - Refraction of waves

By the end of the lesson, the learner should be able to:

- Explain refraction as bending of waves due to change in speed
- Demonstrate refraction of waves in a ripple tank
- Connect refraction to how lenses work in eyeglasses, cameras and microscopes

In groups, learners are guided to:

- Place rectangular plastic sheets to create shallow water regions
- Observe how wave speed and direction change at boundaries
- Sketch wave patterns showing refraction
- Discuss why sound travels farther at night than during the day

Why do waves bend when they move from one medium to another?

- Triumph Physics 10 pg. 147
- Ripple tank
- Clear plastic sheets (rectangular and convex)
- Manila paper
- Markers

- Practical assessment - Written assignments - Observation

Waves and Optics

Properties of Waves - Diffraction of waves

By the end of the lesson, the learner should be able to:

- Define diffraction as bending of waves around obstacles or through gaps
- Demonstrate diffraction using a ripple tank
- Relate diffraction to hearing sound around corners and Wi-Fi signal distribution

In groups, learners are guided to:

- Position metal barriers with gaps in the ripple tank
- Observe wave spreading after passing through gaps of different sizes
- Observe diffraction around obstacles and at edges
- Sketch diffraction patterns and discuss applications

How does the size of an opening affect the amount of wave diffraction?

- Triumph Physics 10 pg. 150
- Ripple tank
- Metal barriers with gaps
- Manila paper
- Markers

- Practical assessment - Observation - Oral questions

Waves and Optics

Properties of Waves - Interference of waves

By the end of the lesson, the learner should be able to:

- Explain constructive and destructive interference
- Demonstrate interference patterns using two spherical dippers
- Connect interference to noise-cancelling headphones and hologram technology

In groups, learners are guided to:

- Attach two spherical dippers to the vibrator
- Observe alternating bright and dark bands formed
- Sketch wave patterns labelling regions of constructive and destructive interference
- Discuss applications of interference in everyday life

What causes some regions to have louder sound while others are quieter when two speakers play the same tone?

- Triumph Physics 10 pg. 152
- Ripple tank
- Two spherical dippers
- Manila paper
- Markers

- Practical assessment - Observation - Written assignments

Waves and Optics

Properties of Waves - Formation and properties of stationary waves

By the end of the lesson, the learner should be able to:

- Describe how stationary waves are formed from two progressive waves
- Identify nodes and antinodes in stationary waves
- Connect stationary waves to musical instruments like guitars and violins

In groups, learners are guided to:

- Stretch a rubber band and pluck to observe stationary wave patterns
- Identify regions of highest amplitude (antinodes) and zero amplitude (nodes)
- Vary tension and observe changes in wave pattern
- Discuss properties of stationary waves

How do nodes and antinodes form in a stationary wave?

- Triumph Physics 10 pg. 155
- Rubber bands
- Slinky spring
- Fixed block
- Smooth surface

- Practical assessment - Observation - Oral questions

Waves and Optics

Properties of Waves - Applications of stationary waves in vibrating strings

By the end of the lesson, the learner should be able to:

- Derive expressions for fundamental frequency and overtones in vibrating strings
- Calculate frequencies of harmonics in vibrating strings
- Connect vibrating strings to stringed musical instruments like guitars and pianos

In groups, learners are guided to:

- Set up a string attached to a fixed support and pulley with masses
- Pluck the string and observe stationary wave patterns
- Measure distance between nodes and antinodes
- Calculate fundamental frequency and overtones

How does changing string tension affect the pitch of sound produced?

- Triumph Physics 10 pg. 159
- String (1-2 metres)
- Fixed support
- Pulley and masses
- Ruler

- Written assignments - Practical assessment - Oral questions

Waves and Optics

Properties of Waves - Applications of stationary waves in vibrating strings

By the end of the lesson, the learner should be able to:

- Derive expressions for fundamental frequency and overtones in vibrating strings
- Calculate frequencies of harmonics in vibrating strings
- Connect vibrating strings to stringed musical instruments like guitars and pianos

In groups, learners are guided to:

- Set up a string attached to a fixed support and pulley with masses
- Pluck the string and observe stationary wave patterns
- Measure distance between nodes and antinodes
- Calculate fundamental frequency and overtones

How does changing string tension affect the pitch of sound produced?

- Triumph Physics 10 pg. 159
- String (1-2 metres)
- Fixed support
- Pulley and masses
- Ruler

- Written assignments - Practical assessment - Oral questions

Waves and Optics

Properties of Waves - Vibrating air columns in closed and open pipes

By the end of the lesson, the learner should be able to:

- Derive expressions for frequencies in closed and open pipes
- Differentiate between harmonics produced in closed and open pipes
- Connect vibrating air columns to wind instruments like flutes and clarinets

In groups, learners are guided to:

- Blow air across closed and open pipes and listen to sounds produced
- Compare pitch differences between closed and open pipes
- Discuss why closed pipes produce only odd harmonics
- Calculate frequencies of harmonics in pipes

Why do closed pipes produce only odd harmonics while open pipes produce all harmonics?

- Triumph Physics 10 pg. 161
- Closed pipe (boiling tube)
- Open pipe
- Ruler

- Written assignments - Oral questions - Practical assessment

Waves and Optics

Properties of Waves - Vibrating air columns in closed and open pipes

By the end of the lesson, the learner should be able to:

- Derive expressions for frequencies in closed and open pipes
- Differentiate between harmonics produced in closed and open pipes
- Connect vibrating air columns to wind instruments like flutes and clarinets

In groups, learners are guided to:

- Blow air across closed and open pipes and listen to sounds produced
- Compare pitch differences between closed and open pipes
- Discuss why closed pipes produce only odd harmonics
- Calculate frequencies of harmonics in pipes

Why do closed pipes produce only odd harmonics while open pipes produce all harmonics?

- Triumph Physics 10 pg. 161
- Closed pipe (boiling tube)
- Open pipe
- Ruler

- Written assignments - Oral questions - Practical assessment

Waves and Optics

Properties of Waves - Vibrating air columns in closed and open pipes

By the end of the lesson, the learner should be able to:

- Derive expressions for frequencies in closed and open pipes
- Differentiate between harmonics produced in closed and open pipes
- Connect vibrating air columns to wind instruments like flutes and clarinets

In groups, learners are guided to:

- Blow air across closed and open pipes and listen to sounds produced
- Compare pitch differences between closed and open pipes
- Discuss why closed pipes produce only odd harmonics
- Calculate frequencies of harmonics in pipes

Why do closed pipes produce only odd harmonics while open pipes produce all harmonics?

- Triumph Physics 10 pg. 161
- Closed pipe (boiling tube)
- Open pipe
- Ruler

- Written assignments - Oral questions - Practical assessment

Waves and Optics

Properties of Waves - Resonance and frequency modulated waves

By the end of the lesson, the learner should be able to:

- Explain resonance and its conditions
- Describe how FM radio waves carry sound information
- Connect resonance to tuning musical instruments and FM to radio broadcasting

In groups, learners are guided to:

- Set up a glass tube in water with a tuning fork to demonstrate resonance
- Adjust air column length to find resonance point
- Tune an FM radio receiver to different stations
- Research how FM radio waves carry sound information

How does a radio receiver select and play a specific FM station?

- Triumph Physics 10 pg. 164
- Glass tube
- Tuning fork
- Container with water
- FM radio receiver

- Oral questions - Written assignments - Observation

Waves and Optics

Properties of Waves - Resonance and frequency modulated waves

By the end of the lesson, the learner should be able to:

- Explain resonance and its conditions
- Describe how FM radio waves carry sound information
- Connect resonance to tuning musical instruments and FM to radio broadcasting

In groups, learners are guided to:

- Set up a glass tube in water with a tuning fork to demonstrate resonance
- Adjust air column length to find resonance point
- Tune an FM radio receiver to different stations
- Research how FM radio waves carry sound information

How does a radio receiver select and play a specific FM station?

- Triumph Physics 10 pg. 164
- Glass tube
- Tuning fork
- Container with water
- FM radio receiver

- Oral questions - Written assignments - Observation

Waves and Optics

Properties of Waves - Resonance and frequency modulated waves

By the end of the lesson, the learner should be able to:

- Explain resonance and its conditions
- Describe how FM radio waves carry sound information
- Connect resonance to tuning musical instruments and FM to radio broadcasting

In groups, learners are guided to:

- Set up a glass tube in water with a tuning fork to demonstrate resonance
- Adjust air column length to find resonance point
- Tune an FM radio receiver to different stations
- Research how FM radio waves carry sound information

How does a radio receiver select and play a specific FM station?

- Triumph Physics 10 pg. 164
- Glass tube
- Tuning fork
- Container with water
- FM radio receiver

- Oral questions - Written assignments - Observation

Waves and Optics

Properties of Waves - Doppler effect and applications

By the end of the lesson, the learner should be able to:

- Explain the Doppler effect and its causes
- Describe how frequency changes when source approaches or recedes
- Connect Doppler effect to ambulance sirens, radar speed detection and medical ultrasound

In groups, learners are guided to:

- Watch videos demonstrating Doppler effect with sound waves
- Observe how sound changes as source moves toward or away
- Discuss real-life applications of Doppler effect
- Record observations on frequency and pitch changes

Why does an ambulance siren sound different as it approaches compared to when it moves away?

- Triumph Physics 10 pg. 166
- Digital devices
- Internet access
- Writing materials

- Oral questions - Written assignments - Observation

Waves and Optics

Properties of Waves - Doppler effect and applications

By the end of the lesson, the learner should be able to:

- Explain the Doppler effect and its causes
- Describe how frequency changes when source approaches or recedes
- Connect Doppler effect to ambulance sirens, radar speed detection and medical ultrasound

In groups, learners are guided to:

- Watch videos demonstrating Doppler effect with sound waves
- Observe how sound changes as source moves toward or away
- Discuss real-life applications of Doppler effect
- Record observations on frequency and pitch changes

Why does an ambulance siren sound different as it approaches compared to when it moves away?

- Triumph Physics 10 pg. 166
- Digital devices
- Internet access
- Writing materials

- Oral questions - Written assignments - Observation

Waves and Optics

Radioactivity and Stability of Isotopes - Terminologies used in radioactivity

By the end of the lesson, the learner should be able to:

- Define terms used in radioactivity including atom, nuclide, half-life and radioisotope
- Explain factors that determine nuclear stability
- Connect radioactivity concepts to medical imaging and carbon dating

In groups, learners are guided to:

- Use digital devices or reference books to find meanings of radioactivity terms
- Discuss atomic number, mass number and isotopes
- Explain nuclear stability and background radiation
- Share findings on terminology in class discussion

What makes some atomic nuclei stable while others are unstable?

- Triumph Physics 10 pg. 169
- Digital devices
- Reference books
- Periodic table

- Oral questions - Written assignments - Observation

Waves and Optics

Radioactivity and Stability of Isotopes - Terminologies used in radioactivity

By the end of the lesson, the learner should be able to:

- Define terms used in radioactivity including atom, nuclide, half-life and radioisotope
- Explain factors that determine nuclear stability
- Connect radioactivity concepts to medical imaging and carbon dating

In groups, learners are guided to:

- Use digital devices or reference books to find meanings of radioactivity terms
- Discuss atomic number, mass number and isotopes
- Explain nuclear stability and background radiation
- Share findings on terminology in class discussion

What makes some atomic nuclei stable while others are unstable?

- Triumph Physics 10 pg. 169
- Digital devices
- Reference books
- Periodic table

- Oral questions - Written assignments - Observation

Waves and Optics

Radioactivity and Stability of Isotopes - Types and properties of alpha, beta and gamma radiations

By the end of the lesson, the learner should be able to:

- Describe the nature, charge and mass of alpha, beta and gamma radiations
- Compare penetrating power and ionising effects of the three radiations
- Connect radiation properties to their use in smoke detectors and medical treatment

In groups, learners are guided to:

- Study cards showing properties of alpha, beta and gamma emissions
- Discuss nature, charge and mass of each radiation type
- Compare penetrating power and ionising effects
- Summarise properties on manila paper for presentation

Why is alpha radiation most dangerous inside the body but least dangerous outside?

- Triumph Physics 10 pg. 171
- Property cards
- Manila paper
- Markers

- Oral questions - Written assignments - Observation

Waves and Optics

Radioactivity and Stability of Isotopes - Behaviour of radiations in electric and magnetic fields

By the end of the lesson, the learner should be able to:

- Describe how alpha, beta and gamma radiations behave in electric and magnetic fields
- Draw diagrams showing deflection of radiations in fields
- Connect radiation deflection to particle accelerators and mass spectrometers

In groups, learners are guided to:

- Draw bar charts comparing penetrating power and ionising effects
- Draw diagrams showing deflection in electric and magnetic fields
- Discuss why gamma rays are not deflected
- Present charts to class for peer learning

Why are alpha and beta particles deflected in opposite directions in electric and magnetic fields?

- Triumph Physics 10 pg. 173
- Manila paper
- Coloured pencils
- Rulers

- Practical assessment - Written assignments - Observation

Waves and Optics

Radioactivity and Stability of Isotopes - Nuclear equations showing how radionuclides attain stability

By the end of the lesson, the learner should be able to:

- Write balanced nuclear equations for alpha, beta and gamma decay
- Balance mass numbers and atomic numbers in nuclear equations
- Connect nuclear decay to energy production in nuclear power plants

In groups, learners are guided to:

- Learn the three main types of radioactive decay
- Write nuclear equations for alpha decay (e.g., Uranium-238 to Thorium-234)
- Write nuclear equations for beta decay
- Practise balancing nuclear equations

How do unstable nuclei transform to achieve stability through radioactive decay?

- Triumph Physics 10 pg. 175
- Periodic table
- Chart of nuclides
- Exercise books

- Written assignments - Oral questions - Observation

Waves and Optics

Radioactivity and Stability of Isotopes - Decay series and chain reactions

By the end of the lesson, the learner should be able to:

- Explain decay series as a sequence of radioactive decays
- Trace the uranium-238 decay series to lead-206
- Connect decay series to geological dating of rocks and minerals

In groups, learners are guided to:

- Observe and copy the Uranium-238 decay chart
- Identify radioactive emissions at each stage
- Write nuclear equations for decay steps in the series
- Present findings on decay series to class

Why does uranium-238 undergo multiple decays before becoming stable lead-206?

- Triumph Physics 10 pg. 178
- Uranium-238 decay chart
- Periodic table
- Exercise books

- Written assignments - Oral questions - Observation

Waves and Optics

Radioactivity and Stability of Isotopes - Decay series and chain reactions

By the end of the lesson, the learner should be able to:

- Explain decay series as a sequence of radioactive decays
- Trace the uranium-238 decay series to lead-206
- Connect decay series to geological dating of rocks and minerals

In groups, learners are guided to:

- Observe and copy the Uranium-238 decay chart
- Identify radioactive emissions at each stage
- Write nuclear equations for decay steps in the series
- Present findings on decay series to class

Why does uranium-238 undergo multiple decays before becoming stable lead-206?

- Triumph Physics 10 pg. 178
- Uranium-238 decay chart
- Periodic table
- Exercise books

- Written assignments - Oral questions - Observation

Waves and Optics

Radioactivity and Stability of Isotopes - Safety precautions in handling and disposing of radioactive substances

By the end of the lesson, the learner should be able to:

- List effects of radiation exposure on human health
- Describe safety precautions when handling radioactive materials
- Connect radiation safety to protection measures in hospitals and nuclear facilities

In groups, learners are guided to:

- Research safety precautions for handling radioactive substances
- Discuss personal protective equipment needed
- Discuss proper methods for storing and disposing radioactive waste
- Create safety poster for class presentation

What safety measures must be followed to minimise radiation exposure?

- Triumph Physics 10 pg. 179
- Digital devices
- Manila paper
- Markers

- Oral questions - Written assignments - Observation

Waves and Optics

Radioactivity and Stability of Isotopes - Detection of radioactive emissions using photographic plates and electroscopes

By the end of the lesson, the learner should be able to:

- Explain how photographic emulsions detect radiation
- Describe how a leaf electroscope detects radiation
- Connect radiation detection to radiation badges worn by hospital workers

In groups, learners are guided to:

- Observe demonstration of photographic plate detection
- Construct a simple electroscope and observe discharge near radioactive material
- Discuss how ionisation affects charge on foil strips
- Compare detection methods and their applications

How do photographic plates and electroscopes indicate the presence of radiation?

- Triumph Physics 10 pg. 180
- Photographic plates
- Electroscope materials
- Radioactive source

- Practical assessment - Oral questions - Observation

Waves and Optics

Radioactivity and Stability of Isotopes - Detection of radioactive emissions using photographic plates and electroscopes

By the end of the lesson, the learner should be able to:

- Explain how photographic emulsions detect radiation
- Describe how a leaf electroscope detects radiation
- Connect radiation detection to radiation badges worn by hospital workers

In groups, learners are guided to:

- Observe demonstration of photographic plate detection
- Construct a simple electroscope and observe discharge near radioactive material
- Discuss how ionisation affects charge on foil strips
- Compare detection methods and their applications

How do photographic plates and electroscopes indicate the presence of radiation?

- Triumph Physics 10 pg. 180
- Photographic plates
- Electroscope materials
- Radioactive source

- Practical assessment - Oral questions - Observation

Waves and Optics

Radioactivity and Stability of Isotopes - Detection using Geiger-Muller counter and cloud chamber

By the end of the lesson, the learner should be able to:

- Describe the working principle of a Geiger-Muller counter
- Explain how cloud chambers make radiation tracks visible
- Connect radiation detectors to nuclear safety monitoring and scientific research

In groups, learners are guided to:

- Research how Geiger-Muller counter and cloud chamber work
- Identify characteristics of tracks from alpha, beta and gamma radiations
- Discuss advantages and limitations of each detection method
- Present findings on detection methods

How does a Geiger-Muller counter convert radiation into measurable signals?

- Triumph Physics 10 pg. 183
- Digital devices
- Reference books
- Manila paper

- Written assignments - Oral questions - Observation

Waves and Optics

Radioactivity and Stability of Isotopes - Half-life and decay curves

By the end of the lesson, the learner should be able to:

- Define half-life and use the decay formula to calculate remaining nuclides
- Plot and interpret decay curves
- Connect half-life to carbon dating of archaeological artefacts

In groups, learners are guided to:

- Demonstrate half-life using water draining from a burette
- Record time taken for different volumes to drain
- Plot decay curve and determine half-life from graph
- Calculate remaining mass after multiple half-lives

How can half-life be used to determine the age of ancient objects?

- Triumph Physics 10 pg. 185
- Burette
- Stopwatch
- Beaker
- Graph paper

- Practical assessment - Written assignments - Oral questions

Waves and Optics

Radioactivity and Stability of Isotopes - Nuclear fission, fusion and applications of radioactivity

By the end of the lesson, the learner should be able to:

- Differentiate between nuclear fission and nuclear fusion
- Write nuclear equations for fission and fusion reactions
- Connect nuclear reactions to power generation, medical imaging and cancer treatment

In groups, learners are guided to:

- Study pictures of nuclear fission reactions
- Discuss chain reactions and their control in nuclear reactors
- Research applications of radioactivity in medicine, industry and agriculture
- Present findings on applications to class

How do nuclear power plants harness fission energy while preventing uncontrolled chain reactions?

- Triumph Physics 10 pg. 189
- Digital devices
- Pictures of nuclear reactions
- Reference books

- Written assignments - Oral questions - Observation

Waves and Optics

Radioactivity and Stability of Isotopes - Nuclear fission, fusion and applications of radioactivity

By the end of the lesson, the learner should be able to:

- Differentiate between nuclear fission and nuclear fusion
- Write nuclear equations for fission and fusion reactions
- Connect nuclear reactions to power generation, medical imaging and cancer treatment

In groups, learners are guided to:

- Study pictures of nuclear fission reactions
- Discuss chain reactions and their control in nuclear reactors
- Research applications of radioactivity in medicine, industry and agriculture
- Present findings on applications to class

How do nuclear power plants harness fission energy while preventing uncontrolled chain reactions?

- Triumph Physics 10 pg. 189
- Digital devices
- Pictures of nuclear reactions
- Reference books

- Written assignments - Oral questions - Observation

Waves and Optics

Radioactivity and Stability of Isotopes - Nuclear fission, fusion and applications of radioactivity

By the end of the lesson, the learner should be able to:

- Differentiate between nuclear fission and nuclear fusion
- Write nuclear equations for fission and fusion reactions
- Connect nuclear reactions to power generation, medical imaging and cancer treatment

In groups, learners are guided to:

- Study pictures of nuclear fission reactions
- Discuss chain reactions and their control in nuclear reactors
- Research applications of radioactivity in medicine, industry and agriculture
- Present findings on applications to class

How do nuclear power plants harness fission energy while preventing uncontrolled chain reactions?

- Triumph Physics 10 pg. 189
- Digital devices
- Pictures of nuclear reactions
- Reference books

- Written assignments - Oral questions - Observation

Electricity and Magnetism

Electrostatics - Origin of charges in a material

By the end of the lesson, the learner should be able to:

- Explain the structure of an atom and origin of electric charges
- Describe how materials become positively or negatively charged
- Connect static electricity to everyday experiences like getting shocked after walking on carpet

In groups, learners are guided to:

- Discuss the origin of charges on materials (atom, nucleus, protons, neutrons, electrons)
- Perform experiments rubbing balloons on woollen cloth
- Observe attraction and repulsion of charged objects
- Discuss SI unit of charge and law of electrostatics

How do objects become electrically charged through the transfer of electrons?

- Triumph Physics 10 pg. 194
- Balloons
- Woollen cloth
- Small pieces of paper

- Oral questions - Observation - Practical assessment

Electricity and Magnetism

Electrostatics - Electric field patterns around charges

By the end of the lesson, the learner should be able to:

- Define an electric field and describe its properties
- Draw electric field patterns for isolated and interacting charges
- Connect electric fields to how lightning rods protect buildings

In groups, learners are guided to:

- Discuss the meaning of electric field and its properties
- Draw field patterns for isolated positive and negative charges
- Draw field patterns between like and unlike charges
- Draw field patterns between charged plates

Why do electric field lines never cross each other?

- Triumph Physics 10 pg. 196
- Manila paper
- Coloured pencils
- Rulers

- Written assignments - Oral questions - Observation

Electricity and Magnetism

Electrostatics - Electric field patterns around charges

By the end of the lesson, the learner should be able to:

- Define an electric field and describe its properties
- Draw electric field patterns for isolated and interacting charges
- Connect electric fields to how lightning rods protect buildings

In groups, learners are guided to:

- Discuss the meaning of electric field and its properties
- Draw field patterns for isolated positive and negative charges
- Draw field patterns between like and unlike charges
- Draw field patterns between charged plates

Why do electric field lines never cross each other?

- Triumph Physics 10 pg. 196
- Manila paper
- Coloured pencils
- Rulers

- Written assignments - Oral questions - Observation

Electricity and Magnetism

Electrostatics - Law of electrostatics

By the end of the lesson, the learner should be able to:

- State the law of electrostatics
- Demonstrate attraction and repulsion between charged objects
- Connect electrostatic forces to how dust clings to TV screens and plastic surfaces

In groups, learners are guided to:

- Suspend a charged plastic ruler and bring another charged ruler close
- Observe attraction and repulsion between similarly and oppositely charged objects
- Rub glass rod with silk and observe interaction with charged ruler
- Discuss the law of electrostatic charges

What determines whether two charged objects will attract or repel each other?

- Triumph Physics 10 pg. 199
- Plastic rulers
- Glass rod
- Silk cloth
- Woollen cloth

- Practical assessment - Oral questions - Observation

Electricity and Magnetism

Electrostatics - Charging by friction and contact methods

By the end of the lesson, the learner should be able to:

- Explain charging by friction and contact methods
- Demonstrate charging of objects using friction and contact
- Connect charging by friction to static shocks from car doors and door handles

In groups, learners are guided to:

- Rub plastic pen with dry cloth and bring near paper pieces
- Sketch distribution of charges on rubbed materials
- Touch charged glass rod to polystyrene ball and observe charge transfer
- Discuss electron transfer in charging by contact

How does rubbing two materials together cause them to become charged?

- Triumph Physics 10 pg. 200
- Plastic pen
- Dry woollen cloth
- Polystyrene ball
- Glass rod

- Practical assessment - Written assignments - Observation

Electricity and Magnetism

Electrostatics - Charging by induction and separation methods

By the end of the lesson, the learner should be able to:

- Explain charging by induction and separation methods
- Demonstrate charging without direct contact
- Connect charging by induction to electrostatic spray painting in industries

In groups, learners are guided to:

- Bring charged polythene rod near insulated metal ball without touching
- Earth the metal ball while charged rod is near, then remove earthing
- Demonstrate charging by separation using two touching metal balls
- Sketch charge distribution during induction process

Why does the charge acquired by induction have opposite sign to the charging rod?

- Triumph Physics 10 pg. 203
- Polythene rod
- Metal balls on insulated stands
- Connecting wire

- Practical assessment - Oral questions - Observation

Electricity and Magnetism

Electrostatics - Charging by induction and separation methods

By the end of the lesson, the learner should be able to:

- Explain charging by induction and separation methods
- Demonstrate charging without direct contact
- Connect charging by induction to electrostatic spray painting in industries

In groups, learners are guided to:

- Bring charged polythene rod near insulated metal ball without touching
- Earth the metal ball while charged rod is near, then remove earthing
- Demonstrate charging by separation using two touching metal balls
- Sketch charge distribution during induction process

Why does the charge acquired by induction have opposite sign to the charging rod?

- Triumph Physics 10 pg. 203
- Polythene rod
- Metal balls on insulated stands
- Connecting wire

- Practical assessment - Oral questions - Observation

Electricity and Magnetism

Electrostatics - Charge distribution on conductors of various shapes

By the end of the lesson, the learner should be able to:

- Explain how charges distribute on conductors of different shapes
- Draw charge distribution on spherical, wedge-shaped and pear-shaped conductors
- Connect charge concentration at points to lightning conductors and Van de Graaff generators

In groups, learners are guided to:

- Research charge distribution on different shaped conductors
- Draw diagrams showing charge distribution on spherical, wedge-shaped, pear-shaped and sharp conductors
- Discuss why charges concentrate at pointed ends
- Present findings on charge distribution to class

Why do charges concentrate at the pointed ends of conductors?

- Triumph Physics 10 pg. 205
- Digital devices
- Reference books
- Manila paper

- Written assignments - Oral questions - Observation

Electricity and Magnetism

Electrostatics - Functions of various parts of an electroscope

By the end of the lesson, the learner should be able to:

- Identify and state functions of parts of a gold leaf electroscope
- Construct a simple electroscope using locally available materials
- Connect electroscope operation to radiation monitoring badges used by hospital workers

In groups, learners are guided to:

- Observe an electroscope and identify its main parts
- Research functions of metallic cap, metal rod, gold leaf and glass casing
- Construct a simple electroscope using paper clip, aluminium foil and plastic container
- Test the constructed electroscope with charged objects

How does each part of an electroscope contribute to detecting electric charges?

- Triumph Physics 10 pg. 207
- Gold leaf electroscope
- Paper clips
- Aluminium foil
- Plastic container

- Practical assessment - Oral questions - Observation

Electricity and Magnetism

Electrostatics - Functions of various parts of an electroscope

By the end of the lesson, the learner should be able to:

- Identify and state functions of parts of a gold leaf electroscope
- Construct a simple electroscope using locally available materials
- Connect electroscope operation to radiation monitoring badges used by hospital workers

In groups, learners are guided to:

- Observe an electroscope and identify its main parts
- Research functions of metallic cap, metal rod, gold leaf and glass casing
- Construct a simple electroscope using paper clip, aluminium foil and plastic container
- Test the constructed electroscope with charged objects

How does each part of an electroscope contribute to detecting electric charges?

- Triumph Physics 10 pg. 207
- Gold leaf electroscope
- Paper clips
- Aluminium foil
- Plastic container

- Practical assessment - Oral questions - Observation

Electricity and Magnetism

Electrostatics - Charging an electroscope by contact and induction

By the end of the lesson, the learner should be able to:

- Describe how to charge an electroscope by contact and induction
- Demonstrate charging and discharging an electroscope
- Connect electroscope charging to understanding how photocopiers transfer toner to paper

In groups, learners are guided to:

- Touch charged polythene rod to metallic cap and observe leaf divergence
- Discharge electroscope by touching cap and observe leaf collapse
- Charge electroscope by induction using charged rod and earthing
- Compare charges acquired by contact and induction methods

Why does the electroscope leaf diverge when the cap is touched by a charged object?

- Triumph Physics 10 pg. 208
- Gold leaf electroscope
- Polythene rod
- Glass rod
- Silk and woollen cloth

- Practical assessment - Oral questions - Observation

Electricity and Magnetism

Electrostatics - Uses of a leaf electroscope

By the end of the lesson, the learner should be able to:

- Describe uses of an electroscope in testing for charges
- Use an electroscope to test presence, type and quantity of charge
- Connect electroscope uses to quality control testing in manufacturing industries

In groups, learners are guided to:

- Use electroscope to test for presence of charge on objects
- Determine type of charge by observing leaf behaviour with known charges
- Compare quantity of charge by degree of leaf divergence
- Test conductivity of different materials using electroscope

How can an electroscope be used to determine both the presence and type of charge?

- Triumph Physics 10 pg. 210
- Gold leaf electroscope
- Various charged objects
- Different materials for testing

- Practical assessment - Written assignments - Observation

Electricity and Magnetism

Electrostatics - Applications of electrostatics in day-to-day life

By the end of the lesson, the learner should be able to:

- Describe applications of electrostatics in various fields
- Explain safety measures against electrostatic hazards
- Connect electrostatics to spray painting, photocopiers, air purifiers and lightning protection

In groups, learners are guided to:

- Research applications of electrostatics using digital devices
- Discuss spray guns, photocopiers, fingerprinting and electrostatic precipitators
- Discuss lightning formation and safety measures during thunderstorms
- Present findings on applications and safety to class

How do electrostatic precipitators help reduce air pollution from factory emissions?

- Triumph Physics 10 pg. 212
- Digital devices
- Reference books
- Manila paper

- Written assignments - Oral questions - Observation

Electricity and Magnetism

Electrostatics - Applications of electrostatics in day-to-day life

By the end of the lesson, the learner should be able to:

- Describe applications of electrostatics in various fields
- Explain safety measures against electrostatic hazards
- Connect electrostatics to spray painting, photocopiers, air purifiers and lightning protection

In groups, learners are guided to:

- Research applications of electrostatics using digital devices
- Discuss spray guns, photocopiers, fingerprinting and electrostatic precipitators
- Discuss lightning formation and safety measures during thunderstorms
- Present findings on applications and safety to class

How do electrostatic precipitators help reduce air pollution from factory emissions?

- Triumph Physics 10 pg. 212
- Digital devices
- Reference books
- Manila paper

- Written assignments - Oral questions - Observation

Electricity and Magnetism

Electrostatics - Applications of electrostatics in day-to-day life

By the end of the lesson, the learner should be able to:

- Describe applications of electrostatics in various fields
- Explain safety measures against electrostatic hazards
- Connect electrostatics to spray painting, photocopiers, air purifiers and lightning protection

In groups, learners are guided to:

- Research applications of electrostatics using digital devices
- Discuss spray guns, photocopiers, fingerprinting and electrostatic precipitators
- Discuss lightning formation and safety measures during thunderstorms
- Present findings on applications and safety to class

How do electrostatic precipitators help reduce air pollution from factory emissions?

- Triumph Physics 10 pg. 212
- Digital devices
- Reference books
- Manila paper

- Written assignments - Oral questions - Observation