Question 244: Ray Optics

Question

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

Accepted Answer

For critical angle $${	heta _c},$$
$$\sin {	heta _c} = {1 \over \mu }$$
For greater wavelength or lesser frequency $$\mu $$ is less.
So, critical angle would be more, So, they will not suffer reflection and come out at angles less then $${90^ \circ }.$$

Answer

The entire spectrum of visible light will come out of the water at an angle of $${90^ \circ }$$  to the normal.

Answer

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

Answer

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

Answer

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

Ray Optics

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

Choose the correct answer: