Across
- 6. A change in observed frequency when a source moves relative to an observer
- 9. Wavelength multiplied by frequency
- 10. Sound cannot travel through this
- 12. When a wave changes direction as it enters a different medium
- 14. Type of wave where vibrations are parallel to the direction of travel
- 15. The time taken for one complete wave to pass a point
- 17. The number of waves passing a point per second
- 18. Type of wave where vibrations are at right angles to the direction of travel
- 19. A repetitive back-and-forth motion
Down
- 1. A transverse electromagnetic wave
- 2. A region in a longitudinal wave where the particles are close together
- 3. A substance through which a wave travels
- 4. When a wave bends around obstacles or spreads through gaps
- 5. The unit of frequency
- 7. When a wave bounces off a surface
- 8. The maximum displacement from the rest position in a wave
- 11. A region in a longitudinal wave where the particles are spread out
- 13. A line connecting points of equal phase in a wave
- 16. The distance between two successive crests or troughs in a wave