70th B.P.S.C. Re-Exam(Pre) 2024

As the diameter of the objective lens of a telescope increases, the resolution of telescope

aRemains same
bDepends on focal length of lens
cIncreases✓ Correct
dDecreases

Explanation

When the diameter of a telescope’s objective lens increases, the resolution of the telescope increases, because resolution is directly proportional to the diameter (D) of the objective lens. Resolving power is the ability of an objective lens to distinguish between two very closely spaced objects.

general-science