1. The problem statement, all variables and given/known data a) what is the angular size of the moon as viewed from the earths surface? b) The objective and eyepiece of a refracting telescope have focal lenghts 80cm and 2.0cm. What is the angular size of the moon as viewed though this telescope? mean radius of the moon- 1.737x10^6m mean distance from earth- 3.854x10^8m 2. Relevant equations Im not sure what equations to use or why the answer from the book is in radians 3. The attempt at a solution i tried using the equation m=near point/ object distace, with the near point being 25cm and object distace being the distance from the earth. HOwever the anwer from the book is in radians. Thanks in advanced!