Light

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Across
  1. 2. a band of colors, as seen in a rainbow
  2. 4. the ray of light coming in
  3. 7. not able to be seen through.
  4. 8. the change of direction of a light ray when it enters a transparnet material
  5. 9. the throwing back by a surface of light.
  6. 10. an oobject which is a source of light.
Down
  1. 1. allows objects to be seen clearly through it
  2. 3. a piece of coloured plastic or glass
  3. 5. an object which is not a source of light.
  4. 6. the splitting up of white light into seperate colors.