73 A cubical tank of edge I and its position are shown in

Last updated: 6/21/2023

73 A cubical tank of edge I and its position are shown in the figure When the tank is empty edge of the bottom of the tank is just visible An insect is at center C of its bottom surface To what height 5 a transparent liquid of refractive index 2 must be poured in the tank so that the insect will become visible 1 3 3 C 1 2 4 2