Across
- 2. the distance between successive crests of a wave, especially points in a sound wave or electromagnetic wave
- 3. spectrum the range of wavelengths or frequencies over which electromagnetic radiation extends.
- 4. the throwing back by a body or surface of light, heat, or sound without absorbing it
- 7. radiation the flow of energy at the universal speed of light through free space
- 11. the number of waves that pass a fixed point in unit time
- 12. he spreading of waves around obstacles
- 13. wave consisting of a periodic disturbance or vibration that takes place in the same direction as the advance of the wave
- 14. the change in direction of a wave passing from one medium to another caused by its change in speed
Down
- 1. the interference of two waves of equal frequency and opposite phase, resulting in their cancellation where the negative displacement of one always coincides with the positive displacement of the other
- 5. the apparent difference between the frequency at which sound or light waves leave a source and that at which they reach an observer
- 6. the interference of two or more waves of equal frequency and phase, resulting in their mutual reinforcement
- 8. the maximum extent of a vibration or oscillation, measured from the position of equilibrium
- 9. a substance or material that carries the wave.
- 10. wave a wave vibrating at right angles to the direction of its propagation