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CBSE Class 12-science Answered

A convex lens made up of glass of refractive index 1.5 is dipped, in turn, in: (i) Medium A of refractive index 1.65 (ii) Medium B of refractive index 1.33 Explain, giving reasons, whether it will behave as a converging lens or a diverging lens in each of these two media.
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
answered-by-expert Expert Answer

(i) Focal length fA in medium A of refractive index 1.65 is given by

As fA is negative, the lens is diverging.

(ii) Focal length fB in medium B of refractive index 1.33 is given by

As fB is positive, the lens is converging.

Answered by | 04 Jun, 2014, 03:23: PM
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