MHT CET 2026 Physics question

In telescopes for a given wavelength, the objectives with large aperture are used for

(A)greater resolution.Correct
(B)reducing lens aberration.
(C)greater magnification.
(D)ease of manufacture.

Answer: (A)

Solution

The resolving power of a telescope is , where is the aperture of the objective. For a given wavelength, a larger aperture gives a larger resolving power (and also gathers more light), option (A).

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Question ID VK-100082