The oscillations of the wave are
The oscillations of the wave are parallel to
perpendicular to the direction of the wave
the direction of the wave energy
energy
Examples: sound waves, ultrasound waves, Examples: seismic waves, light waves, EM
seismic P waves spectrum waves
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, • WAVE – an oscillation which transfers energy but not matter
• WAVELENGTH – the distance from one point on a wave to the same
point on another wave
• AMPLITUDE – the waves height measured from the middle of the
wave to the top
• FREQUENCY – the number of waves passing a point every second – Hz
• TIME PERIOD – the time taken for a single wave to pass a point -
seconds
Wave speed = frequency x wavelength
V=fxλ
Frequency = 1/time period
f = 1/T
THE DOPPLER EFFECT:
• When an object emits waves, the
wave fronts spread out
symmetrically
• If the wave sources move, the
waves can be squashed together or
stretched out
• If an object moves away from the observer, the wave us stretched, so
there is a longer wavelength and there is a lower pitch
• If the object moves towards the observer, the wave is squashed, so
there is a shorter wavelength and there is a higher pitch
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