question_answer

A telescope has an objective lens of 10 cm diameter and is situated at a distance of one kilometre from two objects. The minimum distance between these two objects, which can be resolved by the telescope, when the mean wavelength of light is  \[5000\text{ }{\AA},\] of the order of: [AIPMT (S) 2004]

A) 0.5 m    

B)                               5 m

C) 5 mm  

D)                               5 cm

Correct Answer: C

Solution :

Resolving limit of telescope is

Given,

Hence,