A Keplerian refracting telescope is used to look at craters on the moon.The objective focal length of the telescope is 92 cm and the distance between the objective and eyepiece lenses is 97 cm.The diameter of the objective is 25 cm.What is the angular magnification of this telescope?
A)1.05
B)10.2
C)16.4
D)18.4
E)20.4

Question

Quizplus · Accepted Answer

Angular magnification of a telescope is given by,m = (f_o/f_e)Here, f_o = 92 cm and f_e = 97 cmTherefore, m = (92/97) = 18.4

A Keplerian Refracting Telescope Is Used to Look at Craters