Question

If even one of the two required conditions for total internal reflection is missing, then:

Options

• total internal reflection occurs partially

• total internal reflection will not occur

• the critical angle of the media becomes \[90^\circ\]

• the light refracts with the angle of refraction equal to \[90^\circ\]

Answer 1

Total internal reflection requires both conditions simultaneously: light travelling from an optically denser to an optically rarer medium, and an angle of incidence greater than the critical angle. If even one condition is missing, total internal reflection will not occur.