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In quantum mechanics electron in an atom is described by the wave function of probability. When the electron changes level the wave function changes to another. Is the changing electron level when it emits or absorbs photons have any time duration or it happens immediately?

Qmechanic
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Lexorde
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1 Answers1

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By the uncertainty relation $\Delta E*\Delta t\approx h$ there must be time otherwise $\Delta E$ would be very large.

trula
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