Question

After tracing the path of rays of light through a glass slab for three different angles of incidence, a student measured the corresponding values angle of refraction r and angle of emergence e and recorded them in the table given below:S. No123∠i30°40°50°∠i 20°25° 31° ∠e 31°40°49°The correct observations are:
(A) I and II
(B) II and III
(C) I and III
(D) I, II and III

Answer 1

$<b>$
After tracing the path of rays of light through a glass slab for three different angles of incidence, a student measured the corresponding values angle of refraction r and angle of emergence e and recorded them in the table given below:S. No123∠i30°40°50°∠i 20°25° 31° ∠e 31°40°49°The correct observations are I, II & III.

So, the Answer is :-

$<h1>(d) I, II, III$