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Shown in the figure here is a convergent...

Shown in the figure here is a convergent lens placed inside a cell filled with a liquid. The lens has focal length `+ 20 cm` when in air and its material has refractive index 1.50. If the liquid has refractive index 1.60, the focal length of the system is

A

`+80 cm`

B

`-80 cm`

C

`-24 cm`

D

`-100 cm`

Text Solution

Verified by Experts

The correct Answer is:
D
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