that one puzzle

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Across
  1. 3. when you find the message
  2. 4. when light is directed into your eyes
  3. 6. the direction of light
  4. 7. a language of dots and symbols
  5. 9. when letters can be heard
  6. 10. when light bounces off an object
Down
  1. 1. the way you look at something
  2. 2. something that sends messages
  3. 5. something that gets the message
  4. 8. when letters are on electronics