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S8P4.a
electromagnetic and machanical
Term | Definition |
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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 | par of the longitudinal wave in which the particles expand and move apart |
rarefraction | part of the longitudinal wave in which the particles expand and move apart |
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 wave as the wave passes between the 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 an opening |
transmission | the passing of light of other form of energy through matter |
absorption | in optics, the transfer of light energy to particles of matter |