MHT CET Physics question
Hydrogen (), deuterium (), singly ionised helium () and doubly ionised lithium () all have one electron around the nucleus. Consider an electron transition from to . If the wavelengths of emitted radiation are and respectively, for four elements, then approximately which one of the following is correct?
Answer: (C)
Solution
For a one-electron ion , so (the nuclear mass changes only slightly); for the four species,
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