NEET Physics Optical Instruments MCQ Question
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?
60
120
30
240
Correct Answer
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.
Found an issue with this question?
Related Questions
More from Optical Instruments
Assertion (A): The thin lens formula is applicable to both convex and concave lenses for real and virtual images. | Reason (R): The focal points of a ...
Match Column-I with Column-II. Column-I Column-II (a) Simple Microscope (i) Used for terrestrial observations (b) Refracting Telescope (...
More from
Consider a diagram where a parallel beam of light is incident on a concave mirror. The reflected rays converge at a point on the principal axis. What ...
The optical density of turpentine is higher than that of water while its mass density is lower. Figure shows a layer of turpentine floating over water...
A 2.5 cm tall object is placed 27 cm in front of a concave mirror with a radius of curvature of 36 cm. At what distance from the mirror will the scree...