Calculating the Angular Resolution of the Hubble Telescope

[kingyof2thejring]

Qw The Hubble telescope has a primary mirror with diameter 2.4 m. Calculate the angular resolution of the Hubble telescope in both radians and degrees at a wavelength of 600 nm. Imagine that the Hubble telescope images the surface of the moon, 3.84*10^8 m away. What is the smallest feature on the surface of the moon that the telescope can resolve at a wavelength of 600 nm?
How do you solve for the second part of this question. thanks in advance

 

[OlderDan]

The definition of an angle is? If you know the angular resolution, an object that subtends the resolution angle is the smallest thing that can be resolved.