A radio telescope has a circular collecting dish of diameter 5.0 m. It is used to observe two distant

galaxies that are both emitting electromagnetic radiation of wavelength 20 cm. The images of

the galaxies are just resolved by the telescope. What is the angle subtended by the galaxies at

the telescope?

A. 0.05 rad

B. 0.3 rad

C. 5 rad

D. 30 rad