Scientific Crossword

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Across
  1. 5. the splitting up of a light ray
  2. 9. bringing light rays together
  3. 10. a motion that continuously repeats
  4. 12. a material that allows no light to pass
  5. 13. the hole in the front of your eye
  6. 14. band produced when lights spread out
Down
  1. 1. the lens that spreads light out
  2. 2. bends light rays toward each other
  3. 3. a triangular shaped glass
  4. 4. a material that allows radiation
  5. 6. transparent layer in the front of the eye
  6. 7. sends signals to the rest of the body
  7. 8. gives out light
  8. 9. spreads out light waves
  9. 11. layer at the back of the eye