Science

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Across
  1. 3. The light-sensitive layer of tissue at the back of the eyeball.
  2. 6. Red,orange,yellow,green,blue,indigo,violet.
  3. 8. The distance between a crest and the adjacent crest.
  4. 9. Allowing all light to pass through.
  5. 10. The number of waves that pass a fixed point in unit time.
  6. 11. The bouncing of light rays off an object.
  7. 12. A substance through which light travels.
  8. 13. Allowing most but not all light to pass through.
  9. 14. Has the longest wavelength in the electromagnetic spectrum.
Down
  1. 1. A unit for measuring frequency.
  2. 2. Has the shortest wavelength in the electromagnetic spectrum.
  3. 3. The bending of a lightray.
  4. 4. Allowing no light to pass through.
  5. 5. The process or action by which one thing absorbed.
  6. 7. The range of all types of EM radiation.