When wavelength of light used in optical instruments A and B are 4500 Å and 6000 Å respectively, the ratio of resolving power of A to B will be (a) 9: 16 (b) 16: 9 (c) 7: 1 (d) 4: 3

Answer: (d). Resolving power ∝ (1)/(λ). (RPA)/(RPB) = (λB)/(λA) = (6000)/(4500) = 4/3 So the answer is (d) 4:3.

When wavelength of light used in optical instruments A and B are 4500… | MHT CET 2020 (16 Oct, Shift 2)

Q15MHT CET 2020 · 16 OCT · SHIFT 2Easy

Resolving Power

When wavelength of light used in optical instruments A and B are 4500 $\text{Å}$ and 6000 $\text{Å}$ respectively, the ratio of resolving power of A to B will be

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Answer: (d)

Resolving power $\propto \dfrac{1}{\lambda}$ .
$\dfrac{RP_A}{RP_B} = \dfrac{\lambda_B}{\lambda_A} = \dfrac{6000}{4500} = \dfrac{4}{3}$
So the answer is (d) $4:3$ .

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