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The image for the converging beam after refraction through the curved surface is formed at

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The image for the converging beam after refraction through the curved surface is formed at
image
A. `x=40 cm`
B. `x=40//3`
C. `x=-40//3 cm`
D. `x=20 cm`
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Correct Answer - A
Applying
` mu_2/v-mu_1/u=(mu_2-mu_1)/R`
`:. 1/v-(3//2)/(+30)=(1-3//2)/(+20)`
or `1/v=1/20-3/40`
`:.v=40 cm`
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