Two Stars Are Just Barely Resolved by a Telescope with a Lens

Multiple Choice

Two stars are just barely resolved by a telescope with a lens diameter of 0.500 m. Determine the angular separation of the two stars. Assume incident light of wavelength 500.0 nm.

A) 1.22 × 10^-6 rad
B) 5.66 × 10^-5 rad
C) 2.44 × 10^-7 rad
D) 4.88 × 10^-5 rad
E) 1.22 × 10^-7 rad