Across
- 2. The height of a wave
- 4. Light waves moving in one direction
- 5. A clear object that bends light
- 7. When light bounces off something
- 9. When a wave spreads out after passing through a small gap
- 11. When two waves meet and mix together
- 13. When light bends when it goes from one thing to another
- 15. How fast a wave goes
Down
- 1. A wave that Moves up and down at a right angle to its direction
- 3. The length from one wave crest to the next
- 6. What a wave travels through
- 8. A wave that Moves back and forth
- 10. All the colors of light
- 12. A smooth surface that reflects light
- 14. How many waves pass a spot in one second