Question

A man can see through a hole, the top end of a thin rod of height 'x' , the height of beaker is 3x. If the beaker is filled with a liquid of refractive index 'u' upto height 2x, he can now see the lower end of rod. The value of 'u' is : 1) 5/2 2) √(5/2) 3) √(3/2) 4) 3/2

Answer 1

This is the answer......