Is Energy Conserved When an Atom Emits a Photon?

Thread starter motleycat
Start date Nov 26, 2015
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atom energy energy conservation photon

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When an atom emits a photon, the energy of the atom is not conserved in the same state, as the emission results in a change of energy. The energy of the emitted photon must be accounted for, indicating that the atom loses energy equal to that of the photon. The total energy of the system, including the atom and the emitted photon, remains constant before and after the emission. Thus, while the atom's energy decreases, the overall energy of the system is conserved. This illustrates the principle of energy conservation in quantum processes.

Nov 26, 2015

motleycat

When a photon is emitted by an atom is the energy of the atom conserved?

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Nov 26, 2015

blue_leaf77

Science Advisor

The creation of a photon leaving the atom must imply that the energy of the atom must have changed.

Nov 26, 2015

DrClaude

Mentor

The energy of the emitted photon plus the atom after emission is the same as the energy of the atom before emission.

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