The diameter of objective lens of a telescope is 6 cm and wavelength of light used is
540 nm. What will be the resolving power of telescope?
Resolving power if telescope (RP) = 1/∆θ
= D/1.22 λ
= 6 x ${{10}^{-2}}$/1.22 x 540 x ${{10}^{-9}}$
= 9.1 x ${{10}^{4}}$ ${{rad}^{-1}}$