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Magnification by a lens of an object at ...

Magnification by a lens of an object at distance 10 cm from it is -2. now a seconnd lens is placed exactly at the same positon where first was kept, without changing the distance between object and lens. The magnification by this second lens is -3.
What is the focal length of the combination when both lenses are in contact ?

A

`60/17 cm `

B

`5/17 cm `

C

`12/7 cm `

D

`13/9 cm `

Text Solution

Verified by Experts

The correct Answer is:
A
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