Across
- 5. the length from the center point to the crest
- 7. the capacity for doing work
- 9. occurring frequently
- 12. the bottom of the wavelength
Down
- 1. light does not need this to travel
- 2. the top of a wavelength
- 3. the opposite of compression
- 4. rapidly moving
- 6. extending across something
- 8. vibration that takes place in the same direction
- 10. moving the opposite way the wave is moving.
- 11. From one crest to the other one