1. Refraction Learning Objective: Investigate how light rays can be bent. Starter Activity: Copy When light rays enter and leave different substances they are bent. This is called refraction.

2. A Trick Question Ben put a coin in a mug and moved back so he could not see it. His friend Martin poured some water into the cup and suddenly Ben could see the coin again without moving. Why could Ben now see the coin?

3. The light had been refracted by the water:

4. Investigation air glass normal ray box

5. Conclusion Look at the lines you have drawn on your paper, then complete these sentences. I noticed that the ray of light is refracted (away from/towards) the normal when it goes into a glass block. The ray of light is refracted (away from/towards) the normal when it comes out of a glass block. The ray coming out of the glass block is (parallel/at right angles) to the ray going into the block.