26.5 Exercise 9

Unless otherwise stated, the lens-to-retina distance is 2.00 cm.

A $7.5×$ binocular produces an angular magnification of $- 7 . \text{50}$, acting like a telescope. (Mirrors are used to make the image upright.) If the binoculars have objective lenses with a 75.0 cm focal length, what is the focal length of the eyepiece lenses?