Waves revision

Frequency is the number of complete waves passing a cartain point per second.
Period = 1/frequency
Transverse waves have oscillations perpendicular to the direction on energy transfer.
Examples of transverse waves are: seismic S waves, or electromagnetic waves.
Longitudinal waves have oscillations parallel to the direction of energy transfer.
Examples incluse: seismic P waves, or sound waves.
Wavespeed = frequency x wavelength
Use an oscilloscope to measure the speed of sound, along with microphones.
Angle of incidence = angle of reflection.
Specular reflection happens when a wave is reflected in a single direction by a smooth surface,
Diffue reflection happens when a wave is scattered after being reflected by a rough surface.
Earthquakes and explosions cause seismic waves; we detect these using seismometer.
P-waves travel through the Earth's core, S-waves can't - these can be used to work out the Earth's internal structure.
S-waves can't travel through liquids or gases, P-waves can.
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