waves

4. abrupt change in the direction of propagation of a wave that strikes the boundary between different mediums
5. the apparent difference between the frequency at which sound or light waves leave a source and that at which they reach an observer, caused by relative motion of the observer and the wave source.
6. a substance or material that carries the wave.
8. the maximum displacement or distance moved by a point on a vibrating body or wave measured from its equilibrium position.
9. When two waves of identical wavelength are in phase, they form a new wave with an amplitude equal to the sum of their individual amplitudes
12. a type of interference that occurs at any location along the medium where the two interfering waves have a displacement in the opposite direction.
13. a wave vibrating at right angles to the direction of its propagation.

1. the number of waves that pass a fixed place in a given amount of time.
2. the flow of energy at the universal speed of light through free space or through a material medium in the form of the electric and magnetic fields that make up electromagnetic waves such as radio waves, visible light, and gamma rays.
3. wave consisting of a periodic disturbance or vibration that takes place in the same direction as the advance of the wave.
7. the spreading of waves around obstacles.
10. the range of all types of EM radiation.
11. the change in direction of a wave passing from one medium to another caused by its change in speed.