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A lens is made of flint glass(refractive...

A lens is made of flint glass(refractive index=1.5).When the lens is immersed in a liquid of refractive index 1.25 ,the focal length

A

increases by a factor of 1.25

B

increses by a factor of 2.5

C

increases by a factor o 1.2

D

decreases y a factor of 1.2

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MODERN PUBLICATION-UNIT TEST -06-EXERCISE
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