Activity 01
Mirror Angle Challenge: Predicting Reflections
Pairs use a torch and small mirror to shine light on a wall. They predict and test how tilting the mirror changes the light spot's position, drawing angle diagrams before and after. Discuss results as a class.
Explain why our faces are visible in a mirror but not in a piece of paper.
Facilitation TipDuring the Mirror Angle Challenge, have students work in pairs to predict and test angles with protractors, ensuring they physically mark angles before testing with torches.
What to look forProvide students with a diagram showing a light ray hitting a mirror. Ask them to draw the reflected ray and label the angle of incidence and angle of reflection. Then, ask them to write one sentence explaining why their face is clearer in a mirror than on a piece of paper.
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Activity 02
Stations Rotation: Reflection Surfaces
Set up stations with mirrors, aluminium foil, white paper, and black paper. Small groups shine torches at each, observe clarity of reflections, and note differences in a table. Rotate every 7 minutes.
Assess the origin of the colors observed in a rainbow.
Facilitation TipFor the Station Rotation, assign groups to each surface and require them to record observations in a shared table to compare results quickly.
What to look forHold up a prism and shine a torch through it. Ask students to describe what they observe and to predict what would happen if the angle of the prism changed. Record their predictions and observations.
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Activity 03
Prism Rainbow Makers
In pairs, students direct sunlight through glass prisms onto white paper, adjusting positions to create rainbows. They trace color bands and predict what happens in shade. Share findings whole class.
Predict the effect of altering the angle of a mirror reflecting sunlight.
Facilitation TipWhen using Prism Rainbow Makers, dim the lights to enhance visibility and ask students to sketch the spectrum they see immediately after creating it.
What to look forPose the question: 'Imagine you are designing a periscope. What properties of mirrors would be most important for it to work well, and why?' Facilitate a class discussion where students explain their reasoning based on reflection principles.
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Activity 04
Outdoor Rainbow Hunt
Whole class walks school grounds with water spray bottles, creating mini-rainbows in sunlight. Students position themselves to see colors and sketch observations. Debrief on conditions needed.
Explain why our faces are visible in a mirror but not in a piece of paper.
Facilitation TipDuring the Outdoor Rainbow Hunt, provide spray bottles for students to make mini-rainbows and discuss why all rainbows share the same color order regardless of size.
What to look forProvide students with a diagram showing a light ray hitting a mirror. Ask them to draw the reflected ray and label the angle of incidence and angle of reflection. Then, ask them to write one sentence explaining why their face is clearer in a mirror than on a piece of paper.
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Generate Complete Lesson→A few notes on teaching this unit
Teachers should emphasize the law of reflection (angle of incidence equals angle of reflection) through repeated practice with protractors and torches. Avoid rushing students past the prediction stage, as this step builds critical thinking. Research suggests students grasp dispersion better when they first see a single color refracted, then gradually add more colors to the spectrum.
Successful learning looks like students predicting reflection angles accurately, explaining why smooth surfaces create clear images, and describing how prisms split white light into colors. They should connect these observations to natural phenomena like rainbows and periscope design.
Watch Out for These Misconceptions
During the Mirror Angle Challenge, watch for students who believe mirrors store and send back exact copies of objects.
Use the torch and protractor to show that light bounces off mirrors at equal angles, creating virtual images. Ask students to trace the path of light rays on a whiteboard to correct the idea that mirrors 'store' images.
During the Prism Rainbow Makers activity, watch for students who think rainbows form when sunlight shines through clouds.
Have students observe how a prism splits white light into colors without any cloud involvement. Ask them to explain why rainbows need water droplets, not clouds, using their prism observations as evidence.
During the Station Rotation: Reflection Surfaces, watch for students who assume all shiny surfaces reflect light the same way as mirrors.
Ask students to compare the reflection of a torch beam on aluminum foil versus paper. Have them measure how scattered the light is on each surface and discuss why smoothness matters for clear images.
Methods used in this brief