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:
greater than that of the glass
less than that of the glass
equal to that of the glass
less than one
A
greater than that of the glass
B
less than that of the glass
C
equal to that of the glass
D
less than one
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Solution
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The correct option is C.
Given A biconvex lens having refrective index 1.47
If the biconvex lens act as the plane sheet then the ray will pass un deviated through it only when the medium has the same refrective index as that of biconvex lens.
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