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

Explanation:

a) Medium 2 has higher optical density. More the optical density, lesser the speed of light through that medium. Hence Medium 1 is less optically dense than Medium 2.

b) When the incident ray is incident perpendicular to the junction seperating the two mediums, there shall be no change in the path of the light.

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Answer 2

Answer:

Since light travels faster in Medium A. Medium B is optically denser than Medium A. If the ray of light passes at an angle of 90° from Medium A to Medium B there is no change in direction of propagation.Sep 1, 2019