waves

1. the process by which a beam of light or other system of waves is spread out as a result of passing through a narrow aperture or across an edge, typically accompanied by interference between the wave forms produced.
3. The number of waves that pass a fixed point in a given amount of time
6. occurs when waves come together so that they completely cancel each other out.
7. a wave vibrating in the direction of propagation.
8. the distance between identical points
10. occurs when the maxima of two waves add together
11. an increase (or decrease) in the frequency of sound, light, or other waves as the source and observer move toward (or away from) each other
12. the speed at which a wave travels.
13. the fact or phenomenon of light, radio waves, etc. being deflected in passing obliquely through the interface between one medium and another or through a medium of varying density.
15. the substance that transfers the energy, or light from one substance to another substance or from one place to another, or from one surface to another.

2. a wave vibrating at right angles to the direction of its propagation
4. the range of all types of EM radiation.
5. a kind of radiation including visible light,
9. the maximum extent of a vibration or oscillation, measured from the position of equilibrium.
14. the throwing back by a body or surface of light, heat, or sound without absorbing it.