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Question

A compound microscope has an objective of focal length 2 cm and an eye-piece of focal length 6.25 cm,which are separated by 15 cm.If the final image is formed at the least distance of distinct vision 25 cm, distance to the object from the objective is

A
20 cm
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B
8.75 cm
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C
1.50 cm
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D
2.5 cm
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Solution

The correct option is C 8.75 cm
Objective distance
|Ue|=fe=6.25cm
Image distance from objective lens
|Vo|=(156.25)cm
=8.75cm
Hence option (B) is correct answer

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