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Two thin lenses of focal lengths f1 and ...

Two thin lenses of focal lengths `f_1` and `f_2` are placed in contact with each other. The focal length of the combination is :

A

`(f_1+f_2)/2`

B

`sqrtf_1f_2`

C

`(f_1f_2)/(f_1+f_2)`

D

`(f_1f_2)/(f_1-f_2)`

Text Solution

Verified by Experts

The correct Answer is:
C
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