Question

Distant stars are viewed with the help of an astronomical telescope. The angular separation between two stars which can be just resolved by the telescope

(a) is independent of the diameter of the aperture of the telescope

(b) increases with the increase in the diameter of the aperture of the telescope

(c) decreases with the increase in the diameter of the telescope aperture

(d) increases quadritically with the diameter of the telescope aperture

Answer 1

Correct option  (c) decreases with the increase in the diameter of the telescope aperture 

Explanation:

Resolving limit dθ = λ/d

So resolving limit decreases with increase of diameter of telescope aperture