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18 Cards in this Set
- Front
- Back
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-traveling disturbances
-in an elastic or restorable medium -originate from a source -carry energy |
waves
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types of waves
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-longitudinal (compression)
-transverse (shear) |
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longitudinal or sompression wave
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particles move parallel to motion of the disturbance, in response to compression force. Ex: sound, earthquake
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transverse or shear wave
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particles move perpendicular to disturbance motion, in response to shear forces. Ex: waves on a string, electromagnetic waves
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crest
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places of maximum upward or forward displacement
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trough
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places of maximum downward or backward displacement
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wave properties
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amplitude, speed, wavelength, and frequency
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amplitude
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size of maximum displacement of particles; associated with energy (loudness for sound, and brightness in light)
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wavelength
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distance between successive disturbances
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frequency
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number of repetitions per second; associated with pitch in sound, color in light.
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equation associated with waves
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speed = wavelength x frequency
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wave phenomena
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reflection, refraction, diffraction, interference
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reflection
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BOUNCE of waves (an echo, we see and hear things often by reflection)
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refraction
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BENDING of wave as it moves from one medium to another; responsible for apparent bending of a stick in water; used in making lenses
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diffraction
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natural SPREADING or BENDING of wave, especially around obstacles, through openings, etc...
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interference
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combination of two waves in same region
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which wave phenomena is most evident when wavelength is large
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diffraction
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double slit experiment
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has to do with waves....???
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