A student constructs an astronomical telescope and wishes it to have a magnification of 10. If the telescope has an objective lens of focal length 0.50 m, what must be the focal length of the
Eyepiece?
A) 5.0 cm
B) 2.5 cm
C) 25 cm
D) 10 cm

Question

Quizplus · Accepted Answer

Magnification = - (f_o / f_e) = 10f_o = 0.50 m = 50 cmf_e = - (f_o / Magnification) = - (50 cm / 10) = - 5 cm = 5.0 cm

A Student Constructs an Astronomical Telescope and Wishes It to Have