A telescope has an objective lens of 0.1 m diameter and is situated at a distance of 500 m from two objects. What will be the minimum distance between these two objects which can be resolved by the telescope. The mean wavelength of light is 600 nm.
Answer & explanation
Correct answer: option 3
Resolving Power = $ \frac{d}{D} = \frac{1.22 \lambda}{a}$
$ d = \frac{1.22 \lambda D}{a} = \frac{1.22 \times 600\times 10^{-9} \times 500}{0.1} = 3.66mm$