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Wave Mechanics

Waves are everywhere in nature - and I mean everywhere. Light waves. Sound waves. Water waves. Brain waves.
The surprising/astonishing/amazing thing is; all types of waves are almost identical in behaviour. If you truly understand the behaviour of water waves - the way they interact with each other, the exact way the ripples 'curve' around obstacles - then you can have no trouble understanding accoustics, the propagation of light, or even basic quantum mechanics.
When I say 'identical,' I don't mean this metaphorically. All waves in nature really are mathematically identical!

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The two classes of waves