Across
- 2. The distance from the middle to the top or bottom of a wave
- 6. The highest point of a wave
- 11. Reflection from a smooth surface
- 12. To give out
- 13. The number of complete waves or vibrations produced in one second and is measured in Hertz
Down
- 1. Reflection from a rough surface
- 3. The lowest point of a wave
- 4. The distance between two identical points on the wave
- 5. Gives out light
- 7. The oscillations are parallel to the direction of the wave
- 8. Something that moves backwards and forwards
- 9. The change in direction of a ray or wave as a result of its change in speed
- 10. The vibrations are at right angles to the direction the wave moves