JEE Main | 2014Atomic StructureHard
Question
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 λ1, λ2, λ3 and λ4 respectively then approximately which one of the following is correct?
Options
A.4λ1 = 2λ2 = 2λ3 = λ4
B.λ1 = 2λ2 = 2λ3 = λ4
C.λ1 = λ2 = 4λ3 = 9λ4
D.λ1 = 2λ2 = 3λ3 = 4λ4
Solution
⇒ λ ∝
for given n1 & n2⇒ λ1 = λ2 = 4λ3 = 9λ4
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