Question

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:

If the incident ray follows the normal drawn perpendicularly on the junction plane of 2 mediums, it will not refract. Angle of refraction (angle between the refracted ray and the normal), 'r' also becomes 0 thus no change in direction occurs.

Explanation:

hope it helps you friend

Answer 2

Answer:

Answer. If the incident ray follows the normal drawn perpendicularly on the junction plane of 2 mediums, it will not refract. Angle of refraction (angle between the refracted ray and the normal), 'r' also becomes 0 thus no change in direction occurs.

mark on brainlist