Question

for telescope to have large resolving power the__________
A) focal length of its objective should be large
B) focal length of its eye piece should be large
C) focal length of its eye piece should be small
D) aperture of its objective should be large

Answer 1

Answer:

D) aperture of its objective should be large

For telescope to have large resolving power the aperture of its objective should be large.

Explanation:

The aperture of a telescope's objective should be large in order for it to have a high resolving power. A telescope's objective is a convex lens with a long focal length that faces a distant object and produces a bright image of that object. The objective's aperture is chosen to be large enough to collect enough light from distant objects. By increasing the diameter of the telescope's objective lens, the resolving power of the telescope can be increased. The resolving power of a telescope is defined as the reciprocal of the angular separation between two distant objects that are just resolved when viewed through a telescope. It is dependent on: The diameter of the telescope's objective lens.