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22 Cards in this Set
- Front
- Back
What are waves? |
Waves are a means of transferring energy from place to place. They can also be used to transfer information. These transfers take place with no matter being transferred
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What is a transverse wave?
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A wave that vibrates or oscillates at right angles to the direction in which the energy or wave is moving.
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Give 3 examples of transverse waves.
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Light waves
Waves on the surface of water When you slide the end of slinky from side to side |
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What are longitudinal waves?
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A wave that vibrates or oscillates along the direction in which the energy is moving
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Give 3 examples of longitudinal waves.
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Sound waves
Seismic waves When you push the end of a slinky back and for |
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What happens when a wave moves through a substance?
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It causes particles in a substance to move from their equilibrium or resting position
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What is the amplitude of a particle?
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The maximum movement of particles from their equilibrium caused by a wave
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What is the wavelength of a wave? Give an example.
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The distance between a particular point on one wave to the same point on the next wave.
e.g. from the crest of one wave to the crest of another |
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If the source that is creating a wave vibrates quickly how many waves will be produced per second?
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A large number of waves
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If the source that is creating a wave vibrates slowly how many waves will be produced per second?
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A small number of waves
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What is the frequency of a wave?
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The number of waves passing a particular point per second
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What is frequency measure in?
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Hertz (Hz)
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What is the period of a wave?
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The time it takes for a source to produce one wave
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What is the symbol for frequency?
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f
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What is the symbol for amplitude?
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A
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What is the symbol for wavelength?
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λ
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What is the symbol for a wave's period?
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T
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What is the equation that relates frequency (f) to period (T)?
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Frequency (in Hertz) = 1
time period (in seconds) f (Hz) = 1/T |
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How else can the equation f=1/t be written?
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T=1/f
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What is the equation that links wavelength (λ), frequency (f) and speed (v)?
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Wave speed (m/s)=frequency (Hz) × wavelength (λ)
v=f × λ |
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When the frequency of a wave is low, what is the wavelength?
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Long
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Does the speed of a wave always change with the change of frequency?
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No
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