Question

Light propagates faster through a Medium A than through another Medium B.
(a) Which of the two media has a higher optical density?
(b) State the condition under which no 'change in the direction of propagation' of a light ray would take place when it passes from Medium A to Medium B.​

Answer 1

Answer:

medium a has higher optical density

when both medium will have same density there will be no change in the direction of light ray

Answer 2

medium A has a higher density