P-wave Shock

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Across
  1. 4. The principle of ____________ occurs when two waves meet and overlap.
  2. 5. Distance between two consecutive point in phase
  3. 7. Occur when the system oscillate with its natural frequency.
  4. 9. tank Used in the lab to study water wave
  5. 11. Sound cannot be hear clearly in the air during _________.
  6. 12. From deep to shallow water region, the wave speed is __________.
  7. 14. Sound waves produces a series of compression and ______________________.
  8. 16. A phenomenon when the waves spread out after passing through a gap.
  9. 18. light The only electromagnetic spectrum that can be seen by naked eyes.
  10. 19. Sources with same frequency, wavelength and constant phase different.
Down
  1. 1. Maximum displacement of a particle from its equilibrium position.
  2. 2. wave Used for local radio and TV broadcasting.
  3. 3. An oscillation with its amplitude decreasing with time.
  4. 6. Waves in which the direction of vibration is parallel with the direction of propagation of wave.
  5. 8. Waves that made up of electric field and magnetic field.
  6. 10. In refraction of wave, this quantity is unchanged.
  7. 11. __________ interference occur when a crest and a through meet and overlap.
  8. 13. Easily diffracted due to its long wavelength.
  9. 15. Used in medical field and apply the concept of reflection of wave.
  10. 17. Waves emitted by mobile phone