Question

The resolving power of telescope can be increased by

• A. increasing the diameter of object
• B. increasing the wavelength of light used
• C. decreasing the diameter of objective
• D. decreasing the frequency of light used

Answer 1

Answer: (A)

increasing the diameter of object

Answer 2

As we know,
the resolving power of a telescope $= \frac {d}{1.22\lambda}$
where, $d$ is the diameter of objective. So if the diameter of objective lens of telescope is increased then the resolving power will be increase.