Light 1

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Across
  1. 2. allows no light to pass through
  2. 4. electromagnetic ______
  3. 7. light is a form of ____
  4. 8. a beam of light that comes together at a point
  5. 10. 300 000 000 metres per second
  6. 11. light we can see
  7. 12. a material that allows all light to pass through it
Down
  1. 1. light can travel in a ____
  2. 3. a beam of light that travells straight
  3. 4. light travels in ___ lines
  4. 5. frosted glass is an example of ___ material
  5. 6. some materials allow some light to pass through them and ____ the rest
  6. 9. light does not need a ___ to travel in