Singly ionized helium is a hydrogen-like atom that has a
Chapter , Problem 68(choose chapter or problem)
Singly ionized helium is a hydrogen-like atom that has a nuclear charge of Its energy levels are given by where and If a beam of visible white light is sent through a gas of singly ionized helium, at what wavelengths will dark lines be found in the spectrum of the transmitted radiation? (Assume that the ions of the gas are all in the state with energy prior to irradiation.)
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