light

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Across
  1. 2. shows direction of light
  2. 3. beam where rays move out from point
  3. 5. beam where rays have same distance apart
  4. 7. path along which light travels
  5. 8. light travel in blank lines
Down
  1. 1. beam where rays meet at a point
  2. 4. light is a form of this
  3. 6. a collection of rays