Ciro Santilli
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Planck-Einstein relation

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Photon energy is proportional to its frequency: $$energy=(plancks constant)∗(frequency) (16)$$ or with common weird variables: $$E=h∗ν (17)$$
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This only makes sense if the photon exists, there is no classical analogue, because the energy of classical waves depends only on their amplitude, not frequency.
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Experiments that suggest this:
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