Light Crossword

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Across
  1. 4. This is how we see
  2. 5. An object used the refract or disperse light
  3. 7. An arch of colors produced by light
  4. 9. A material that lets some light through
  5. 11. A material that lets no light through
  6. 13. To bend light
  7. 14. To separate light into colors
Down
  1. 1. To light something up
  2. 2. A dark area made by an object blocking light
  3. 3. Strength needed for an activity
  4. 6. To send back light in an opposite direction
  5. 8. The path light takes from the source
  6. 10. A material that lets all light through
  7. 12. To take in light energy and change it to heat energy