Question
When a biconvex lens of glass having refractive index 1.47 is dipped in a liquid, it acts as a plane sheet of glass. This implies that the liquid must have refractive index
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equal to that of glass
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less than one
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greater than that of glass
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less than that of glass
Solution
A.
equal to that of glass
If biconvex lens behaves like a plane sheet, the ray will pass undeviated through it only when the medium has a same refractive index as that of a biconvex lens.
