The necessary conditions for total internal reflection are

(A) Light must travel from denser to rarer medium.
(B) The angle of incidence in the denser medium must be less than the critical angle for the two media.
(C) Light must travel from rarer to denser medium.
(D)The angle of incidence in the denser medium must be greater than the critical angle for the two media.

Choose the correct answer from the options given below:

(A) and (D) only

Explanation:

Total Internal Reflection are:

(A) Light must travel from denser to rarer medium.

(D) The angle of incidence in the denser medium must be greater than the critical angle for the two media.

The correct answer is Option (3) → (A) and (D) only