• A wave is something which transfers energy without transferring matter
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what are the two different types of waves?
Transverse and Longitudinal
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what is a transverse wave?
Direction of wave propagation is perpendicular to oscillations.
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what is a longitudinal wave?
Direction of wave propagation is parallel to oscillation
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name 2 transverse waves
water and any wave on the em spectrum
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name the 2 types of longitudinal wave
sound and p-wave (earthquake)
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what is the highest point of a wave?
peak
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what is the lowest point of a wave?
trough
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what is compression?
where the particles are close together
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what is rarefaction?
where the particles are spread apart
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what is the wavelength?
The distance between one point on a wave and the exact same place on the next wave.
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what does frequency mean?
How many waves go past a point in one second; unit of measurement is hertz (Hz).
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what happens to the energy of the wave when frequency increase?
The higher the frequency, the more energy in the wave.
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what is the amplitude?
How far the medium moves from rest position (where it is when not moving).
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how does compression and rarefaction effect amplitude?
The closer together and further apart the particles are, the larger the amplitude.
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what is wave speed?
Depends on the medium in which the wave is travelling. It varies in solids, liquids and gases.
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what is the equation for wave speed?
wave speed = wavelength(m) x frequency(HZ) or v = f x ג
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what is reflection?
When waves bounce off a surface
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what is the law or reflection?
If the surface is flat, the angle at which the wave hits the surface will be the same as the angle at which it leaves the surface (angle in = angle out).
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what is refraction?
when a wave bends
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why does refraction happen?
This happens when a wave enters a new medium and its speed changes
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