Light and Sound terms

123456789101112
Across
  1. 5. a wave vibrating at right angles to the direction of its propagation.
  2. 8. reflection of sound waves from a surface back to the listener
  3. 9. "Black" light
  4. 10. Longest wave with lowest energy
  5. 11. Sterilise medical equipment and kill bacteria
  6. 12. Shaking back and forward
Down
  1. 1. Used to heat water molecules in food
  2. 2. section of the Em spectrum that the human eye can see
  3. 3. used in Medical imaging
  4. 4. Used to create night vision
  5. 6. a wave vibrating in the direction of propagation.
  6. 7. used to measure sound volume