A person is observing a bacteria through a compound microscope. For better observation and to improve its resolving power he should (a) increase the wavelength of light. (b) increase the refractive index of the medium between the object and objective lens. (c) decrease the focal length of the eyepiece. (d) decrease the diameter of the objective lens.

Answer: (b). Resolving power of a microscope = (2nsin θ)/(1.22λ). Larger n (oil immersion) raises it; larger λ or smaller objective lowers it; the eyepiece does not matter. So the answer is (b) increase the refractive index of the medium between the object and objective lens.

A person is observing a bacteria through a compound microscope. For… | MHT CET 2023 (10 May, Shift 1)

Q11MHT CET 2023 · 10 MAY · SHIFT 1Easy

Resolving Power

A person is observing a bacteria through a compound microscope. For better observation and to improve its resolving power he should

Show answer and solution

Answer: (b)

Resolving power of a microscope $= \dfrac{2n\sin\theta}{1.22\lambda}$ .
Larger $n$ (oil immersion) raises it; larger $\lambda$ or smaller objective lowers it; the eyepiece does not matter.
So the answer is (b) increase the refractive index of the medium between the object and objective lens.

Report a mistake

Resolving Power question from MHT CET 2023 (10 May, Shift 1)

More questions on Resolving Power