Hi,all, why electron absorb photon costs FINITE time? Not only for electron, when phonon(adsbygoogle = window.adsbygoogle || []).push({});

interact with photon(absorbs it) also costs finite time.

As I think, it should be instant, can not find any reason for finite time. Helps!

Thanks In advance!

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# Why electron absorbs photon costs FINITE time?

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