wave

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Across
  1. 3. time taken for one complete oscillation
  2. 5. what is color of EM wave spectrum 0,7 micrometer ?
  3. 12. wave has speed 3 x 10^8 m/s
  4. 13. the number of complete oscillation generated persecond
  5. 14. periodic back and forth motion of particles of an elastic body or medium
  6. 15. frequency range is > 20 kHz
Down
  1. 1. the range of frequencies in which a person can hear
  2. 2. multiplication sound reflection
  3. 4. use for maritime radio
  4. 6. travel parallel to the direction of the vibration
  5. 7. a disturbance that travels trough a medium from one location to another
  6. 8. spreading a wave around a barrier or through an opening
  7. 9. wave that need medium to travel
  8. 10. the strongest EM wave
  9. 11. turning back of a wave when it reaches the boundary of the medium through which it is travelling