Hydrogen ( 1 H 1 ), Deuterium ( 1 H 2 ), singly ionised Helium ( 2 He 4 ) + and doubly…
Physics · JEE Main · NTA Exams — Atoms and Nuclei
Hydrogen (1H1), Deuterium (1H2), singly ionised Helium (2He4)+ and doubly ionised lithium (3Li6)+ + all have one electron around the nucleus. Consider an electron transition from n = 2 to n = 1. If the wave lengths of emitted radiation are \(\lambda_{1}, \lambda_{2}, \lambda_{3} \text { and } \lambda_{4}\) respectively then approximately which one of the following is correct ?
- \(\lambda_{1}=2 \lambda_{2}=2 \lambda_{3}=\lambda_{4}\)
- \(\lambda_{1}=\lambda_{2}=4 \lambda_{3}=9 \lambda_{4}\)
- \(\lambda_{1}=2 \lambda_{2}=3 \lambda_{3}=4 \lambda_{4}\)
- \(4 \lambda_{1}=2 \lambda_{2}=2 \lambda_{3}=\lambda_{4}\)
Answer
(B) _ 1 = _ 2 =4 _ 3 =9 _ 4
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