S2.6.7 For the adult
Mirrors and shiny things
Why can I see myself in a mirror but not a wall?
What this chapter teaches
A smooth surface bounces light one way, so you see an image, and a rough surface sends light every way, so you do not. The angle a ray comes in at equals the angle it goes out at.
Three questions to ask
There is no one right wording. Listen for the idea.
- Why can you see yourself in a mirror but not in a wall?
- What do you think happens to the spot of light when you swing the torch the other way?
- Why does an image in still water break up when the water ripples?
After the chapter, the learner can
- Say why a mirror shows a picture and a wall does not
- Say how a ray of light bounces off a mirror
- Use a mirror and a torch safely
What they copy into their notebook
A smooth, shiny thing bounces light one way. You see an image. A rough thing sends light every way. The angle in equals the angle out. Never shine sunlight from a mirror into eyes.