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

Question

A green light is incident from the water to the air-water interface at the critical angle (θ). Select the correct statement. (A) The entire spectrum of visible light will come out of the water at an angle of 90° 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 to the air medium (D) The entire spectrum of visible light will come out of the water at various angles to the normal

Tardigrade Admin · Accepted Answer

sin θc=(1/μ) <img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/physics/9f0db19b1b927c48b7d123883bf97c16-.png" /> For greater wavelength (i.e. lesser frequency) μ is less So, θc would be more. So, they will not suffer reflection and come out at angles less then 90°.

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

The entire spectrum of visible light will come out of the water at an angle of $9 0^{\circ}$ to the normal

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

The spectrum of visible light whose frequency is more than that of green light will come out to the air medium

The entire spectrum of visible light will come out of the water at various angles to the normal

$sin θ_{c} = \frac{1}{μ}$

For greater wavelength (i.e. lesser frequency) $μ$ is less
So, $θ_{c}$ would be more. So, they will not suffer reflection and come out at angles less then $9 0^{\circ}$ .

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

The entire spectrum of visible light will come out of the water at an angle of 90∘ to the normal