Science class choice board

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Across
  1. 2. matter that allows some light to pass through
  2. 3. Used to transmit information between cellphones or between an internet router and computer
  3. 6. used to transmit television and radio programs
  4. 8. Wave signals that are generated from digital information
  5. 10. matter that does not allow light to pass through
  6. 11. the science of light properties and behavior
  7. 12. used to transmit information from remote control to a tv
Down
  1. 1. A unique 3 digit combination of dots and dashes for each number of the alphabet and number 1-9
  2. 4. A wave with a specific pattern that carries information
  3. 5. wave signals that are not generated from digital information
  4. 7. the region where light is obstructed or blocked
  5. 9. Matter that allows all light to pass through