Question

Resolving power of telescope increases when ______.

Options

• wavelength of light decreases

• wavelength of light increases

• focal length of eye-piece increases

• focal length of eye-piece decreases

Answer 1

Resolving power of telescope increases when wavelength of light decreases.

Explanation:

Resolving power of a telescope is given by

RP = `"d"/(1.22lambda)`

As RP ∝ `1/lambda`

∴ The resolving power of a telescope increases as the wavelength of light decreases.