Hubble Telescope question

Question

The Hubble Space Telescope is a reflecting telescope in orbit about the earth so that its resolution would not be limited by turbulence in the atmosphere. Its objective diameter is 2.4 m. For visible light with the wavelength of 550 nm estimate the improvement in resolution over earthbound telescopes which are limited in resolution to about half an arc second ( 1º = 3600 arc seconds). The Hubble is only limited by diffraction.

Answer 1

The hubble telescopes resolution limit is about 0.05 arc seconds - about ten times better than earthbound telescopes.