When a biconvex lens of glass having refractive index \( 1.47 \) is...

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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
P implies that the liquid must have refractive index:

W
(2012 Pre)
(a) Equal to that of glass
(b) Less then one
(c) Greater than that of glass
(d) Less then that of glass
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