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Waves
| Term | Definition |
|---|---|
| wave | a periodic disturbance in a solid, liquid, or gas as energy is transmitted through a medium |
| medium | a physical environment in which phenomena occur |
| mechanical wave | a wave that needs a medium in which to travel |
| transverse wave | a wave in which the particles of the medium move perpendicularly to the direction the wave is traveling |
| longitudinal wave | a wave in which the particles of the medium vibrate parallel to the direction of wave motion |
| compression | part of the longitudinal wave where the particles bunch up closer together |
| rarefraction | part of the longitudinal wave in which the particles expand and move arpart |
| electromagnetic wave | a wave that consists of electric and magnetic fields that vibrate at right angles to each other |
| reflection | the bouncing back of a ray of light, sound, or heat when the ray hits a surface that does not go through |
| refraction | the bending of a ray as the wave passes between two substances in which the speed of the wave differs |
| diffraction | a change in the direction of a wave when the wave finds an obstacle or an edge, such as a opening |
| transmission | the passing of light or other form of energy through matter |
| absorption | in optics, the transfer of light energy to particles of matter |