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Two refracting media are separated by a ...

Two refracting media are separated by a spherical interface as shown in the figure.

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The correct Answer is:
A, B, C, D
A-Q, B-P, C-T, D-R
`V_0=(Kq)/(R//2)+(K(-2q))/(2R)=(Kq)/R`
`V_0` (due to inner surface change) =`- (kq)/R`
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