The objective lens of a refracting astronomical telescope has a focal length of 60 cm, and the eyepiece has a focal length of 2.0 cm. How far apart should the lenses be placed in order to form a
Final image at infinity?
A) 62 cm
B) 60 cm
C) 76 cm
D) 58 cm
E) 44 cm

Question

Quizplus · Accepted Answer

For a final image at infinity, the distance between the lenses should be equal to the sum of their focal lengths, which is 60 cm + 2 cm = 62 cm.

The Objective Lens of a Refracting Astronomical Telescope Has a Focal