Question

If a ray incidents on first surface with an
angle of 30° and emerges with 20° at sec-
ond surface, the angle between the above
two surfaces is 40° then angle of devia-
tion =


please answer this question fast.....​

Answer 1

Answer:

ANSWER

Since, δ=i+i’–A

So there exits two angles of incidence, the same magnitude of deviation except minimum deviation (where both i and i’ are equal).

Since it is true from law of reversibility.

Explanation: