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Level 2

Waves UNIT 1


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Amplitude
the displacement from the rest position to the crest (not from the trough to the crest)
Wave length
the length of a full cycle of the wave e.g. from crest to crest.
frequency
the number of complete waves passing a certain point per second or the number of waves produced by a source each second
hertz
measurement for frequency
transverse waves
waves the vibrations are perpendicular (at 90 degrees) to the direction of energy transfer of the wave.
Examples of transverse waves
1. Light and other EM waves
longitudinal wave
the vibrations are parallel to the direction of energy transfer
symbol for wave length
lambda
examples of longitudinal waves
Sound waves and ultrasound. Shock waves e.g. seismic waves. Slinky spring when you push the end
kHz
1000 hertz
MHz
1000000 hertz