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Parth (parthkohli):

A man can see through a hole the top end of a thin rod of height x. The height of the beaker is 3x. If the beaker if filled with a liquid of refractive index mu upto height 2x, he can now see the lower end of the rod. The value of mu is?

Parth (parthkohli):

|dw:1414943120352:dw|

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