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Waves - Coggle Diagram
Waves
Require a medium
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No ground, no earthquakes (seismic waves)
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Transverse waves
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Eg. rope waves, guitar/violin strings
Longitudinal waves
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Eg. sound waves, spring waves
Combined / surface waves
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Earthquakes: S-wave (transverse), P-wave (longitudinal), surface wave
Don't need a medium, but can travel through one
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- Properties of Mechanical Waves
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Frequency
How often; complete waves per second, measured in Hz
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Reflection (bounce)
Wave bounces back off a boundary; eg. mirror, echo
Regular reflection: smooth surface, clear image
Diffuse reflection: rough surface, rays scatter
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Refraction (bend)
Direction changes when entering a new medium, because speed changes
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Along the normal: no direction change, speed still changes