Across
- 3. Vibrations are at right angles to direction of energy transfer.
- 5. Vibrations are parallel to direction of energy transfer.
- 6. Height of the wave crest measured from middle.
- 7. Distance travelled by a wave crest per second
- 8. Unit of frequency
- 9. Number of waves per second.
Down
- 1. Areas where particles are further apart.
- 2. Distance from one crest to the next.
- 4. Areas where particles are squashed together.