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End of chapter wa
waves | hi |
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Diffraction | The change in direction of a wave when it encounters and obstacle or edge. |
Refraction | The bending of waves as they pass from one medium to another at an angle |
Standing Wave | A pattern of virbration that resembles a stationary wave |
Reflection | The bouncing back of a wave when it meets a surface or boundary |
constructive interference | Interference that increases ampiltude |
Destructive interference | Interference that decreases ampiltude |
Principle of superposition | Method of adding crests and troughs of interferring waves together to describe a new wave |
beats | sounds produced by the interference of sound waves that are used to tune piano strings |
interference | the combination of two or more wave that results in a single wave |
nodes | points in a standing wave that have no virbration due to destructive interference |
Sound | A vibration that propagates as an audible wave of pressure, through a medium such as a gas, liquid or solid. |
Pitch | the quality of a sound governed by the rate of vibrations producing it; |
Infrasonic | vibrational or stress waves in elastic media, having a frequency below those of sound waves that can be detected by the human ear |
Ultrasonic | vibrations of frequencies greater than the upper limit of the audible range for humans |
Doppler | the change in wave frequency during the relative motion between a wave source and its observer |
Acoustics | The branch of physics that is concerned with the study of sound |