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,two types of waves longitudinal and transverse
longitudinal waves (diagram)
transverse waves (diagram)
example of longitudinal wave sound is the ONLY longitudinal wave
examples of transverse waves water, light, x-rays and radio waves
what is a longitudinal waves? a wave in which the particles vibrate in the same direction as the wave travels
what is a transverse wave? a waves in which the particles vibrate at 90 degrees to the direction the wave
travels
frequency the number of waves per second
speed of wave formula:
frequency is measured in (units) ? Hertz (Hz)
period time for one wave
diffraction is the bending of waves around obstacles
, __________ ______ diffract more longer waves
why is reception better in hilly areas? (diffraction) radio waves have a longer wavelength, they can therefore diffract more around hills
and so can be picked up more easily.
diffraction (diagram)
pitches (frequency of waves)
loudness (frequency of waves)
high frequency= higher pitch
low frequency= low pitch
small amplitude= quiet
large amplitude= loud
speed of sound in air 340 m/s