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waves
vocab
Question | Answer |
---|---|
wave | a disturbance that moves through matter or space and carries energy |
transverse wave | causes particles in matter to move back and forth at right angles to the direction in which the wave travels |
compressional wave | causes matter to move back and forth along the same direction in which the wave travels |
wavelength | the distance between one point on a wave and the nearest point moving with the same speed and direction. |
frequency | the number of wavelengths that pass by a point each second |
law of reflection | the angle that the incoming wave makes with the normal equals the angle that the outgoing wave makes with the normal |
refraction | the change in direction of a wave when it changes speed as it travels from one material to another |
diffraction | bending of waves around an object |
mechanical | needs matter:matter ex;earthquake, sound |
electromagnetic | needs no matter;space ex;light or heat |