The ratio of resolving powers of an optical microscope for two wavelengths λ_1 = 4000 and λ_2 = 6000 is :

1. 9 : 4

2. 3 : 2

3. 16 : 81

4. 8 : 27

Doubtly Asked 30 Oct 2026 NEET UG 2017 neet Save WhatsApp Report

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Answer: 2. 3 : 2

Key idea: resolving power of a microscope is \(\propto\dfrac1\lambda\).

\(\dfrac{R_1}{R_2}=\dfrac{\lambda_2}{\lambda_1}=\dfrac{6000}{4000}=\dfrac32\), i.e. 3 : 2.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

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