Physics-Optical Instruments
NEET Physics Optical Instruments MCQ Question
Type: MCQ-numerical-Easy-Class 12
A refracting telescope has an objective lens with a focal length of 120 cm and an eyepiece lens with a focal length of 2 cm. What is the magnifying power of this telescope?
A
60
B
120
C
30
D
240
Correct Answer
Option A
Detailed Explanation
The magnifying power of a refracting telescope is given by the formula m = f_o / f_e, where f_o is the focal length of the objective lens and f_e is the focal length of the eyepiece lens. Substituting the given values, m = 120 / 2 = 60.
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