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