Treat the Pupil of Your Eye as a Circular Aperture

Short Answer

Treat the pupil of your eye as a circular aperture of diameter 3.5 mm. Light of wavelength
500 nm is used to view two point sources that are 283 m distant from you. How far apart
must these two point sources be if they are to be just barely resolved by your eye,
assuming that the resolution is limited by diffraction?