AIPMT PRELIMS2012Physics-Atomic Physics
AIPMT PRELIMS 2012 Physics Hydrogen Spectrum MCQ Question
Type: MCQ-numerical-Hard-Class 12
Electron in hydrogen atom first jumps from third excited state to second excited state and then from second excited to the first excited state. The ratio of the wavelengths λ₁ : λ₂ emitted in the two cases is
A
20/7
B
7/5
C
27/20
D
27/5
Correct Answer
Option A
Detailed Explanation
Using the Rydberg formula, the wavelengths are inversely proportional to the difference in the squares of the principal quantum numbers. The ratio λ₁/λ₂ = 20/7.
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