physics--light

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Across
  1. 3. block of glass or other transparent material that disperses light to form a spectrum
  2. 4. lens to make things look bigger
  3. 6. occurs when light hits a source and bounces of in a different direction
  4. 7. imaginary line that is drawn perpendicular from the point of impact of a light ray on a surface
  5. 9. The scientific study of light and its behavior
  6. 12. substance that allow some light to pass through
  7. 15. substance that doesn't allow light to pass through
  8. 16. artificial source of light that converts chemical energy into light
  9. 17. An image that can be projected on a screen
Down
  1. 1. lens that is thicker at the edges than in the middle
  2. 2. An object that reflects light
  3. 5. bending of light when it moves from one transparent material to another of different density
  4. 8. when light shines on a red surface, only the______color is reflected
  5. 10. angle of _______, the angle made with the normal by the incoming light ray
  6. 11. natural source of light
  7. 13. when light shines on a black surface, all the colors are_______
  8. 14. light travels in ______lines