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NEET 2017

Exam: NEET
Year: 2017
Subject: Physics
Chapter: Ray Optics

NEET 2017 · Physics · Ray Optics

The ratio of resolving powers of an optical microscope for two...

The ratio of resolving powers of an optical microscope for two wavelengths

{\lambda}_{1} = 4000Å

and

{\lambda}_{2} = 6000Å

is

Options

A $8: 27$
B $9: 4$
C $3: 2$
D $16: 81$

Correct answer

C. $3: 2$

Step-by-step solution

Resolving power

∝ \dfrac{1}{\lambda}

\dfrac{{R}_{1}}{{R}_{2}} = \dfrac{{\lambda}_{2}}{{\lambda}_{1}}

= \dfrac{6000Å}{4000Å}

= \dfrac{3}{2}

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