Question

A green light is incident from the water to the air -water interface at the critical angle ($\theta$). Select the correct statement.

• A. The entire spectrum of visible light will come out of the water at an angle of ${90}^o$ to the normal.
• B. The spectrum of visible light whose frequency is less than that of green light will come out of the air medium.
• C. The spectrum of visible light whose frequency is more than that of green light will come out of the air medium.
• D. The entire spectrum of visible light will come out of the water at various angles to the normal

Answer 1

The correct option is B The spectrum of visible light whose frequency is less than that of green light will come out of the air medium.

$\begin{array}{c}\text{A green light is incident}\\ \text{from the water to the}\\ \text{air water interface at}\\ \text{the critical angle}\theta \text{the}\\ \text{spectrum of visible light}\\ \text{whose frequency is}\\ \text{less that of green light}\\ \text{will come out of}\\ \text{the medium.}\end{array}$