wave

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Across
  1. 4. waves — use for maritime radio
  2. 8. wave — wave has speed 3 × 10⁸ m/s
  3. 11. — time taken for one complete oscillation
  4. 12. range — the range of frequencies in which a person can hear
  5. 13. wave — travel parallel to the direction of the vibration
  6. 14. — frequency range is > 20 kHz
Down
  1. 1. — color of EM wave spectrum 0.7 micrometer
  2. 2. — multiplication sound reflection
  3. 3. — spreading a wave around a barrier or through an opening
  4. 4. — turning back of a wave when it reaches the boundary of the medium through which it is travelling
  5. 5. rays — the strongest EM wave
  6. 6. — a disturbance that travels through a medium from one location to another
  7. 7. — the number of complete oscillation generated per second
  8. 9. wave — wave that need medium to travel
  9. 10. — periodic back and forth motion of particles of an elastic body or medium