Circular Apertures and Resolution
A beam of light always spreads out. Why can a beam not be created with parallel rays to prevent spreading? Why can lenses, mirrors, or apertures not be used to correct the spreading?
lU fli.t Rr {,'do,l f ,$r.t*ta-1 ott o9r.cl ia111".,,"F !) alcil -*{ilplae !: f-,-tg i,r4i*.t; t*lt't L 6 l.'\^. +u ,k'! {.,*, &, oL "f,6., u+ €l-{, R.,J.{* ft*u : lo- 1{j;gf;;*,r,