Crossword craziness

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Across
  1. 2. one of the three primary colors
  2. 3. filters different wavelengths
  3. 5. needs no medium to travel
  4. 8. cyan is an example of this
  5. 10. red orange and blue are examples of this
  6. 11. is an example of an electromagnetic wave
  7. 13. light passes through
  8. 16. when light gets trapped
  9. 17. created when no light passes through
  10. 18. an electromagnetic wave with the shortest wavelength
  11. 19. adding more pigments gets you closer to this color
  12. 20. all colors of light combined
Down
  1. 1. mirror
  2. 4. longest wavelength
  3. 6. some light passes through most is scattered
  4. 7. changes direction
  5. 8. large source of heat and energy
  6. 9. red and violet have the longest and shortest length of this
  7. 12. blocks all light
  8. 14. the rainbow
  9. 15. bends colors and light
  10. 17. this happens when light is translucent
  11. 21. fire provides this