Light

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Across
  1. 5. A lens or mirror that diverges light.
  2. 7. When light or sound bounces off an object.
  3. 14. The property of light which makes it bend as it travels through different objects
  4. 15. Light that hits a surface
  5. 16. The type of wave that sound will travel as.
  6. 18. Light waves travelling in only one plane
  7. 19. This will get larger and smaller to allow different amounts of light into the eye.
  8. 20. The structure at the back of the eye which detects light.
Down
  1. 1. The structure at the front of the eye that protects it.
  2. 2. Light rays that shine away from one another.
  3. 3. The point at which light rays will cross over.
  4. 4. Light rays that will form a focus.
  5. 6. The type of wave that light will travel as.
  6. 8. A transparent object that will converge or diverge light.
  7. 9. Vision with one eye.
  8. 10. A lens or mirror that converges light.
  9. 11. An object which light can travel through.
  10. 12. The parts of the retina that detect different colours.
  11. 13. Vision with two eyes.
  12. 17. An object which light cannot travel through.