What do you know about waves ?

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Across
  1. 2. Lowest point of a wave
  2. 5. Disturbance carrying energy through matter
  3. 7. It measures waves
  4. 10. Perpendicular waves to the direction of the travel
  5. 11. Time interval between two waves
  6. 12. Distance between the X axis and the crest
Down
  1. 1. Reciprocal of the period
  2. 3. Unit for frequency
  3. 4. Distance between two crests or two troughs
  4. 6. Waves in the same direction of the travel
  5. 8. Highest point of a wave
  6. 9. Unit for the period