When dots are printed from a laser printer to form letters, they must be close enough so that you do not see the individual dots
of ink. To do this, the separation of the dots must be less than Raleigh’s criterion of your eye at distances typical for reading. Take the pupil of the eye to be 3.5 mm in diameter and the distance from the paper to the eye as 39 cm. Find the minimum separation of two dots such that they cannot be resolved in cm. Assume a wavelength of 555 nm for visible light.
