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S8P4.a and S8P4.b
Term | Definition |
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wave | a periodic disturbance in a solid , liquid, or gas energy is transmitted through a medium |
medium | a physical environment in which phenomena occur |
mechanical wave | a ave that needs a medium in which to travel |
longitudinal wave | a wave in which the particles of the medium vibrate parallel to the direction of the wave motion |
transverse wave | a wave in which the particles of the medium move perpendicularly to the direction the wave is travleing |
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 apart |
electromagnetic wave | a wave that consists of electric and magnetic fields that vibrate at rights angels to each other |
reflection | the bouncing back of a ray of light, sound , or heat when the ray hits a surface that is 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 a opening |
transmission | the passing of light or or other form of energy through matter |
absorption | in optics, the transfer of light energy to particles of matter |