The resolving power of a telescope depends on

Options

A. length of the telescope
B. focal length of an objective
C. diameter of an objective
D. focal length of an eyepiece

Answer

c

Explanation

Diameter of an objective
R.P. of telescope `= 1/(d theta) = a/(1.22 lambda)`
Thus, it is clear that a telescope with a large diameter of the objective has higher resolving power. Thus, the resolving power of a telescope depends on the diameter of an objective.