Across
- 2. The region where light is obstructed or blocked
- 4. Matter that allows some light to pass through
- 7. Matter that does not allow light to pass through
- 8. a wave with a specific pattern that carries information
- 10. Wave signals that are not generated from digital information
- 11. Wave signals generated electronically from digital information
- 12. The science of light properties and behavior
Down
- 1. A unique 3-signal combination of dots and dashes codes for each letter of the alphabet and numbers 0 through 9.
- 3. used to transmit information from a remote control to a television
- 5. used to transmit television and radio programs
- 6. Matter that allows all light to pass through
- 9. used to transmit information between cellphones or between an internet router and a computer