Across
- 2. number of waves in a second
- 5. moves in direction started
- 6. substance which wave can be transmitted
- 7. below the normal human hearing range
- 10. light actually converges
- 13. always curve inward
- 14. locations where light appeared to converge
- 15. bending wave as it passes at an angle
- 16. always curve outward
Down
- 1. perpendicular to direction started
- 3. waves having no special phase relation
- 4. frequency above normal human hear range
- 5. monochromatic with most waves in phase
- 8. the region where particles are the farthest
- 9. distance from crest to crest (or trough)
- 11. distance from equilibrium point
- 12. beam that only vibrates in one direction