Light crossword puzzle

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Across
  1. 3. energy that we can see
  2. 5. thicker in the middle than at the edges
  3. 6. light moves through an object and bends
  4. 7. can see through an object but not clearly
  5. 9. thinner in the middle than at the edges
  6. 11. a clear object that reflects light as the light moves through
  7. 12. shows the colors of white light
  8. 13. when light bounces off a medium
Down
  1. 1. the bending and spreading of waves as they move around a barrier or through an opening
  2. 2. parts of light that are reflected from an object
  3. 3. a piece of glass or other clear material with curved sides
  4. 4. can see through an object clearly
  5. 8. range of colors in light
  6. 10. cannot see through an object at all