"Comparing Formulas: E=p^2/2m and E=hf

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    E=hf Formulas
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alik
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What is the difference between formulas E=p^2/2m and E= hf ?
 
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You cannot understand a formula without its context. The first E in reality means: Energy of a non-relativistic, non-interacting, classical particle. The second E refers to the energy of a non-interacting, quantum photon.
 

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