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Cutting of Thin Lenses

Focal length ...

Question

Focal length of a conves lens of refractive index 1.5 in 2 cm. Focal length of lens when immeraced in a liquid of refractive index of 1.25 will be

A

10 cm

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B

2.5 cm

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C

5 cm

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D

7.5 cm

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Solution

The correct option is C 5 cm

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