If a visible photon with wavelength 434 nm is emitted from
If a visible photon with wavelength 434 nm is emitted from an atom in a hydrogen gas lamp, what energy state was the atom in before the photon was emitted? That is, what was the number for that state?
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if a visible photon with wavelength 434 nm is emitted from an atom in a hydrogen gas lamp what energy state was the
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