Question

If the focal length of objective and eye lens are 1.2 cm and 3 cm respectively and the object is put 1.25 cm away from the objective lens and the final image is formed at infinity. The magnifying power of the microscope is :

A

150

B

200

C

250

D

400

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

Using the lens formula for the objective lens,



This gives  
Now, magnification is given

Substituting the values,

Thus,

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