Verified Solution • 2025–26 Session moderate

QAIPM-2012-Ph-1769: NEET 2012 Physics - Class 12 AIPM-2012-Ph-1769 Solution: Electron in hydrogen atom first jumps from third excited state…

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

\lambda_1 : \lambda_2

emitted in the two cases is 7/5 27/20 27/5 20/7

Multiple Choice Options

A 2 m $-$ _ 1
B 0.5 m $-$ _ 1
C 6 m $-$ _ 1
D 3 m $-$ _ 1

Step-by-Step Verified Solution

Compare the given equation with E = E 0 cos(kz - _ t ) we get, _ = 6 _ 10 8 s -1 Wave vector, k = _ c = 6 _ 10 8 3 _ 10 8 = 2 m -1

Related Learning Resources & Exam Preparation

NEET PYQ Question Bank

Browse year-wise authentic previous years' questions with solutions

Authentic CBT Mock Tests

Simulate official exam environment with live timer and percentile scoring