A hydrogen atom in an excited state emits a photon of
A hydrogen atom in an excited state emits a photon of frequency ? = 2.924 x 1015 s-1. If the electron returns to the ground state, in which level was it before the photon was emitted?
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a hydrogen atom in an excited state emits a photon of frequency 2924 x 1015 s-1 if the electron returns to the ground
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