question_answer

Two point white dots are 1 mm apart on a black paper. They are viewed by eye of pupil diameter 3 mm. Approximately, what is the maximum distance at which these dots can be resolved by the eye? [Take wavelength of light = 500 nm]                               [AIEEE 2005]

A) 5 m

B) 1 m

C) 6m

D) 3 m

Correct Answer: A

Solution :

[a] We know that

where,wavelength of light

diameter of pupil