1. How do water waves affect the escape of light from below the surface of the water?

2. Explain why a fish under water appears to be at a different depth below the surface than it actually is. Does it appear deeper or shallower?

3. Does light always travel in a straight line? Explain.

4. Explain how total internal reflection allows light in a glass fiber to be guided along the fiber.

5. Under what conditions will a converging lens form a virtual image?

6. Under what conditions will a converging lens form a real image that is the same size as the object?

7. Under what conditions will a diverging lens form a virtual image that is smaller than the object?