I always have some interesting on the photon. after I read the oscillator expansion of the electromagnetic field in a finite volume, I find photon is more a mathematical concept in theoretical physics than real particle.(adsbygoogle = window.adsbygoogle || []).push({});

not like electrons, number of photon is a representation of the energy level of a oscillator.by absorbing or emitting a photon the energy level of the oscillator will be changed.

thereofre not like electron the wave function of a photon is meaningless because the position coordinate of the photon has no physical meaning. But of course we can discuss the energy and momentum of a photon.

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# About photon

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