wave motion
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Transcript of wave motion
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A wave is a vibratory disturbance through a material (medium) or space.Waves transfer energy without transferring mass.
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No medium required.Travel at the speed of light .c = 3 x 108 m/sExamples: visible light, x-rays, infrared
rays
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MECHANICHAL WAVES
Require a medium ex. Sound, water, waves in springs.
• Longitudinal wavesExamples - sound, seismic s-waves• Transverse wavesExamples: light, seismic p-waves, water
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TRANSVERSE WAVES
Waves that move the medium at right angles to the direction in which the waves are traveling .
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CREST AND TROUGH
Crest: A point on the wave where the displacement of the medium is at maximum.Trough: A point on the wave where the displacement of the medium is minimum.
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LONGITUDINAL WAVES
Longitudinal waves have vibrations moving in the same direction that the wave is travelling in.
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COMPRESSSION AND RAREFRACTION
Compression: A region in a longitudinal waves where the particles are closest together.Rarefraction: A region in a longitudinal wave where particles are farthest apart.
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PROPERTIES OF WAVES
Amplitude Frequency Speed wavelength
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AMPLITUDE
Maximum distance the particles of the medium carrying the wave move away from their rest positions.
Amplitude of a transverse wave is the maximum distance the medium moves up or down from its rest position.
Amplitude of a longitudinal wave is a measure of how compressed or rarefied the medium becomes.
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WAVELENGTH
A wave travels a certain distance before it starts to repeat. The distance between two corresponding parts of a wave is its wavelength.
Transverse measure from crest to crest or trough to trough.
Longitudinal measure from one compression to the next.
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The number of complete waves that
pass a given point in a certain amount of
time.
Frequency measured in hertz
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SPEED, WAVE LENGTH & FREQUENCY
The speed, wavelength, and frequency of a wave are related to each other by a mathematical formula.
Speed = wavelength x frequency Frequency = speed/wavelength Wavelength = speed/frequency
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