A transparent cube of 15 cm edge contains a small air bubble. Its apparent depth when viewed through one face is 6 cm and when viewed through opposite face is 4 cm. The refractive index of material of cube is

A transparent cube of 15 cm edge contains a small air bubble. Its appa

1.	A transparent cube of 15 cm edge contains a small air bubble. Its apparent depth when viewed through one face is 6 cm and when viewed through opposite face is 4 cm. The refractive index of material of cube is
A.	2.0
B.	1.5
C.	1.6
D.	2.5
Answer» C. 1.6