Across
- 5. a wave vibrating at right angles to the direction of its propagation.
- 8. reflection of sound waves from a surface back to the listener
- 9. "Black" light
- 10. Longest wave with lowest energy
- 11. Sterilise medical equipment and kill bacteria
- 12. Shaking back and forward
Down
- 1. Used to heat water molecules in food
- 2. section of the Em spectrum that the human eye can see
- 3. used in Medical imaging
- 4. Used to create night vision
- 6. a wave vibrating in the direction of propagation.
- 7. used to measure sound volume