Question

state the condition under which no change in the direction of propagation of a little would take place when it passes from medium a to medium???




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Answer 1

Answer:

medium medium medium..

Answer 2

Answer:

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Explanation:

. 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.