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01/10/2020 10:58 am
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Which transition in the hydrogen atomic spectrum will have the same wavelength as the transition, n = 4 to n = 2 of He+ spectrum?
(a) n = 4 to n = 3
(b) n = 3 to n = 2
(c) n = 4 to n = 2
(d) n = 2 to n = 1
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