Total internal reflection of a light ray travelling from denser medium to rare medium occurs only when angle of incidence is

Question

Total internal reflection of a light ray travelling from denser medium to rare medium occurs only when angle of incidence is (A) 45° (B) 90° (C) acute (D) more than a certain value

Tardigrade Admin · Accepted Answer

When the angle of incidence is more than a certain value the angle of refraction becomes more than 90°. It result into total internal reflection (critical angle).

Q. Total internal reflection of a light ray travelling from denser medium to rare medium occurs only when angle of incidence is

$4 5^{\circ}$

$9 0^{\circ}$

acute

more than a certain value

When the angle of incidence is more than a certain value the angle of refraction becomes more than $9 0^{\circ}$ . It result into total internal reflection (critical angle).