Question

The focal length of objective and eye piece lens of a microscope are 1.6 cm & 2.5 cm respectively. Distance between two lenses is 21.7 cm .If the final image is formed at infinity what is the linear magnification?

A

10

B

11

C

110

D

44

Medium
Updated on : 2022-09-05
Solution
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Correct option is B)

Given,

Separation between lense,

Focal length of eye piece,

Focal length of objective lens,

Where is the length of the microscope and e the focal length of the objective

Substituting we get:

According to lens formula we know that:

Magnification,

Hence, linear magnification is  

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