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