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The focal lengths of the objective and e...

The focal lengths of the objective and eyelens of a microscope are 1.6 cm and 2.5 cm respectively. The distance between the two lenses is 21.7 cm. If the final image is formed at infinity, the distance between the object and the objective lens is :

A

1.8 cm

B

1.70 cm

C

1.65 cm

D

1.75 cm

Text Solution

Verified by Experts

The correct Answer is:
D
`L=v_(0)+f_(e)" "," "21.7=v_(0)+2.5`
`v_(0)=19.2cm" "," "(1)/(19.2)-(1)/(mu_(0))=(1)/(1.6)`
`(1)/(mu_(0))=(10)/(192)-(10)/(16)" "," "mu_(0)=-1.75cm`
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