Focusing light

12 questions

1. The diagram shows light changing direction as it passes from one medium to another. This effect is called ___.
2. Which of the following statements are correct?
3. A pupil holds up a screen to face the full Moon at night. Which of the following explains why an image of the Moon does not appear on the screen?
4. A light ray passes from air into a glass block, but it is not refracted. Which of the following statements can explain this?
5. Light crosses a boundary from one material into another. Which of the following statements is correct?
6. Which of the following diagrams correctly shows light refracting through a rectangular block?
7. Which of the following statements about images made on a screen by a convex (converging) lens is correct?
8. A pupil wants to use a lens to make an image of a bright object appear on a screen. Where should the pupil put the screen to see a clear image?
9. The more powerful a lens is, the shorter its focal length. Which of the following changes would make a lens more powerful?
10. The diagram shows a lens focusing light from a tree. Three of the rays are shown. At which of the labelled distances is an image formed?
11. Which of the following happen when a lens forms an image of an object?
12. The image shows a convex lens. Which of the following statements about the lens is correct?

License: OGL