Question by ddddddddddpoop: How does the energy of a photon of visible light emitted by an atom compare to the energy change in the atom?
How does the energy of a photon of visible light emitted by an atom compare to the energy change within the atom itself? THANKS SO MUCH!

Best answer:

Answer by bill y
The two are identical and of opposite sign, though the energy change of the atom is experienced as a reduction in its mass.

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