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