Question

Answer the following questions in brief.
1
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.
2. Why does a pencil appear bent when it is partially dipped in water?​

Answer 1

Answer:

1. Medium A has a higher optical density
2. Direction doesn't change when both mediums have equal optical density
3. Pencil appears to be bent in water. The light rays bend towards the normal when moving from air to water. This refraction causes the formation of apparent depth.