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, then approximately which one of the following is correct? [JEE (Main) 2014]
Answer: (C)
Solution
(nuclear mass effect negligible), so with :
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