Across
- 7. The number of wavelengths in a given distance
- 10. Light travels in....
- 14. Distance to the sun
- 16. the energy that travels in light waves
- 17. distance between crests
- 18. Used in keyless entry
Down
- 1. We can't see it but it can burn skin
- 2. Speed of light
- 3. Light that can pass trough flesh
- 4. The only type of light we can see
- 5. top of the wave
- 6. Number of different waves the sun gives off
- 8. Light travels in straight lines yet in
- 9. Used in the phones
- 11. bottom of the wave
- 12. used in radiation treatment
- 13. The height of the wave
- 15. used in remote controls