Optics Question 367

Question: The magnifying power of a simple microscope is 6. The focal length of its lens in metres will be, if least distance of distinct vision is 25 $ cm $

[MP PMT 2001]

Options:

A) 0.05

B) 0.06

C) 0.25

D) 0.12

Show Answer

Answer:

Correct Answer: A

Solution:

$ m=1+\frac{D}{f}\Rightarrow 6=1+\frac{25}{f}\Rightarrow f=5\ cm=0.05\ m $



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