The amplitude of a wave is the displacement from the rest position to a crest or trough.
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What is wavelength?
Wavelength is the length of a full cycle (from crest to crest or compression to compression)
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What is frequency?
Frequency is the number of cycles wavespassing a certain point per second
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what is a period?
The period is the number of seconds it takes for one full cycle.
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What is frequency measured in?
Hertz (Hz)
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Describe a transverse wave
In transverse waves the vibrations are perpendicular to the direction of the wave.
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True or false, most waves are transverse waves, this includes all of the Electromagnetic specrtum, S-waves, Ripples and waves in water?
True
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desribe a longitudinal wave
in a longitudinal wave the direcction of the wave and the vibrations run parallel to each other.
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give 3 examples of a longitudinal wave
Sound waves, slinky, vibrations in gases
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what is a compression?
a compression is a squashed up part of a longitudinal wave
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what is the equation to work out the wave speed?
wave speed = Frequency x Wavelength
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what can you use to measure the speed of sound?
an Oscilloscope
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what can you measure using strobe lights?
you can measure the speed of water ripples with strobe lights
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what can you use to find the speed of waves in solids?
peak frequency
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what happens to waves at boundaries?
waves are absored, tranmitted and reflected at boundaries
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give a definition of refraction
when light hits a different medium, on an angle then it will change direction.this is because part the light will hit the medium at a differen time than the otherside, this causes the light to change direction.when light hits a medium it will slow.
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what is the angle of incidence?
incoming light ray
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what two angles should be the same?
the angle between normal and the line of incidence and the angle between normal and the refracted light ray.
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True or false, all the waves on the em spectrum are transverese waves?
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