Q123 / 180 · NEET 2017 · Physics

The ratio of resolving powers of an optical microscope for two wavelengths $λ_{1} = 4000 Å$ and $λ_{2} = 6000 Å$ is

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

Solution

Resolving power

\propto \frac{1}{λ}

\frac{R_{1}}{R_{2}} = \frac{λ_{2}}{λ_{1}}

= \frac{6000 Å}{4000 Å}

= \frac{3}{2}

Hence, the correct answer is option: 'C'.

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