The Moon Is Observed Using a Telescope That Has an Objective

Multiple Choice

The moon is observed using a telescope that has an objective lens with a focal length of 3.0 m and an eyepiece with a focal length of 6.0 cm. What is the angular diameter of the moon if the earth-moon distance is 3.85 × 10⁸ m and the diameter of the moon is 3.48 × 10⁶ m?

A) 0.36 rad
B) 0.45 rad
C) 0.72 rad
D) 0.90 rad
E) 1.4 rad