Across
- 3. a unit of frequency
- 6. ratio between two physical quantities
- 9. lowest part of the wave
- 11. The time it takes for two successive crests
- 13. wave a wave vibrating in the direction of propagation
- 15. a wave vibrating at right angles to the direction of its propagation
- 17. how often a recurring event as wave occurs
- 18. the maximum extent of a vibration
- 19. description of the frequency of the sound
- 20. vibration that propagates an acoustic wave
Down
- 1. the spreading of waves around obstacles
- 2. maximum value of upward displacement in
- 4. the troughs of the wave
- 5. region in a longitudinal wave where the particles are closest together
- 7. how loud or soft a sound seems to a listener
- 8. electromagnetic radiation detected by eye
- 10. an expression of the orientation of the lines of electric flux in an electromagnetic field
- 12. distance between identical points
- 14. the speed at which a wave travels
- 16. the change in direction of a wave passing from one medium to another caused by its change in speed