NEET Physics Question - Ray Optics - Reflection by Spherical Mirrors

Assertion (A): In telescopes objective lens is taken of large diameter or aperture.

Reason (R): Larger aperture remove spherical aberration.

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Solution:

A large diameter objective lens in telescopes increases the light-gathering power and improves resolving power, allowing observation of fainter and finer details. Hence, Assertion (A) is true. However, spherical aberration generally *increases* with larger apertures, as rays further from the principal axis are not focused at the same point. Thus, Reason (R) is false.

Rankers Physics

Telescope Objective Aperture

Solution:

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