physics crossword puzzle

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Across
  1. 3. The rate at which a wave travels in a medium
  2. 7. A wave that vibrating in the direction of propagation
  3. 11. The bending of a wave passing thought mediums
  4. 12. displacement of a points on a wave
  5. 13. wave with a smaller amplitude that can even complete cancellation
  6. 14. all kinds of light
  7. 15. Moves perpendicular to a direction
Down
  1. 1. their crests and troughs coincide of two waves
  2. 2. carrier of energy or disturbance on a wave
  3. 4. Has both electric and magnetic wave
  4. 5. the wave bounces off the boundary and travels back in the direction it came from.
  5. 6. the sound of a police car moving away from you
  6. 8. Distance between two crest
  7. 9. The spreading of a waves around obstacle
  8. 10. The number of waves that pass a fixed point in some time