Question

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 at
which dots can be resolved by the eye? [Take wavelength of light = 500 nm)


1) 6 m
2) 3 m
3) 5 m
4) 1m

I need full explanation please​

Answer 1

Answer:

We have y/d less than equal to 1.22 frequency /d

D is less than equal to yd / 1.22 *frequency =

10 power -3 *3 * 10 power - 3 divided

By 1.22 *5*10power - 7

=30 by 6.1

Therfore d max = 5