Across
- 1. length of wave from one crest to another
- 3. the point where all of the light is focused
- 4. highest frequency
- 9. highest point of wave
- 12. changes in speed of light/temperatures
- 13. return of a wave back to it's original medium
- 15. they burn you
- 16. thicker in middle than on sides
- 17. displacement longitudinal to wave direction
- 18. cancerous if overly exposed
Down
- 2. displacement perpendicular to wave direction
- 5. height of the wave
- 6. how often or quickly a wave passes by
- 7. slightly below red in terms of frequency
- 8. time taken to complete a cycle
- 10. lowest point of wave
- 11. Thinner in middle than on sides
- 14. 2 types of this: converging, diverging