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The refractive index of a material of a ...

The refractive index of a material of a planoconcava lens is `5/3`, the radius of curvature is 0.3 m. The focal length of the lens in air is

A

`-0.45 m`

B

`-0.6m`

C

`-0.75m`

D

`-1.0m`

Text Solution

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The correct Answer is:
A
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