question_answer

Calculate the limit of resolution of a telescope objective having a diameter of 200 cm, if it has to detect light of wavelength 500 nm coming from a star:- [JEE Main 8-4-2019 Afternoon]

A)       \[305\text{ }\times \text{ }10-9\text{ }radian\]B

B) \[\,152.5\text{ }\times \text{ }10-9\text{ }radian\]

C) \[610\text{ }\times \text{ }10-9\text{ }radian\]

D) \[457.5\text{ }\times \text{ }10-9\text{ }radian\]

Correct Answer: A

Solution :

[a] Limit of resolution of telescope

radian