The Yerkes refracting telescope has a 1-m diameter objective lens of focal length 20 m and an eyepiece of focal length 2.0 cm.What is the magnification of the planet Mars as seen through this telescope?
A) 800
B) 1000
C) 400
D) 200

Question

Quizplus · Accepted Answer

The magnification of a telescope is given by the formula: Magnification = Focal length of the objective lens / Focal length of the eyepiece. Here, the focal length of the objective lens is 20 m (or 2000 cm) and the focal length of the eyepiece is 2.0 cm. Therefore, the magnification is 2000 cm / 2.0 cm = 1000.

The Yerkes Refracting Telescope Has a 1-M Diameter Objective Lens