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