A glass beaker has diameter 4cm wide at the bottom. An observer observes the edge of bottom when beaker is empty as shown in figure. When the beaker is completely filled with liquid of refractive index n = √(5/2) ,he can just see the centre of bottom, then the height of glass beaker is :
(A) 4 cm
(B) √(5 / 2 cm)
(C) 16 cm
(D) of these
