1. The problem statement, all variables and given/known data The radio telescope at Arecibo, Puerto Rico, has a reflecting spherical bowl of 295 m diameter. Radio signals can be received and emitted at various frequencies with appropriate antennae at the focal point of the reflecting bowl. At a frequency of 200 MHz, what is the angle between two stars that can barely be resolved? 2. Relevant equations θmin= (1.22λ)/D θmin= minimum angle required for resolution (rad) λ = wavelength D = diameter of aperture 3. The attempt at a solution Should be fairly straightforward but I'm getting hung up on what I am sure is something silly. The equation above should be all that is needed. Just do (1.22*1.5)/295 as specified by the problem for θmin (in radians). I know I must be overlooking something simple, so any help is greatly appreciated. Thanks!