Across
- 4. the number of to-and-fro vibrations in a given time
- 7. a wave that does not require a medium
- 9. the time it takes for a complete vibration
- 10. a wiggle in space and time
- 11. vibration is at right angles (sideways) to wave travel
Down
- 1. is named after Austrian physicist and mathematician Christian Johann Doppler
- 2. a wave that requires a medium through which to travel
- 3. this occurs when sound waves are affected by uneven winds
- 5. vibration is the direction of travel
- 6. describes how fast the disturbance moves through the medium
- 8. the combined effect of two or more overlapping waves
- 12. a wiggle in time