a green light is incident from the water to the air water

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

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

Solution :
Ray Optics mcq solution image

For critical angle $${\theta _c},$$
$$\sin {\theta _c} = \frac{1}{\mu }$$
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°.

Releted MCQ Question on
Optics and Wave >> Ray Optics

Releted Question 1

When a ray of light enters a glass slab from air,

A. Its wavelength decreases.

B. Its wavelength increases.

C. Its frequency decreases.

D. neither its wavelength nor its frequency changes.

View Answer

Releted Question 2

A glass prism of refractive index 1.5 is immersed in water (refractive index $$\frac{4}{3}$$ ). A light beam incident normally on the face $$AB$$ is totally reflected to reach on the face $$BC$$ if

A. $$\sin \theta \geqslant \frac{8}{9}$$

B. $$\frac{2}{3} < \sin \theta < \frac{8}{9}$$

C. $$\sin \theta \leqslant \frac{2}{3}$$

D. None of these

View Answer

Releted Question 3

A ray of light from a denser medium strike a rarer medium at an angle of incidence $$i$$ (see Fig). The reflected and retracted rays make an angle of $${{{90}^ \circ }}$$ with each other. The angles of reflection and refraction are $$r$$ and $$r’$$ The critical angle is

A. $${\sin ^{ - 1}}\left( {\tan r} \right)$$

B. $${\sin ^{ - 1}}\left( {\tan i} \right)$$

C. $${\sin ^{ - 1}}\left( {\tan r'} \right)$$

D. $${\tan ^{ - 1}}\left( {\sin i} \right)$$

View Answer

Releted Question 4

A ray of light from a denser medium strike a rarer medium at an angle of incidence $$i$$ (see Fig). The reflected and retracted rays make an angle of $${{{90}^ \circ }}$$ with each other. The angles of reflection and refraction are $$r$$ and $$r’$$ The critical angle is

A. $${\sin ^{ - 1}}\left( {\tan r} \right)$$

B. $${\sin ^{ - 1}}\left( {\tan i} \right)$$

C. $${\sin ^{ - 1}}\left( {\tan r'} \right)$$

D. $${\tan ^{ - 1}}\left( {\sin i} \right)$$

View Answer

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

Releted MCQ Question on
Optics and Wave >> Ray Optics

When a ray of light enters a glass slab from air,

A glass prism of refractive index 1.5 is immersed in water (refractive index $$\frac{4}{3}$$ ). A light beam incident normally on the face $$AB$$ is totally reflected to reach on the face $$BC$$ if

A ray of light from a denser medium strike a rarer medium at an angle of incidence $$i$$ (see Fig). The reflected and retracted rays make an angle of $${{{90}^ \circ }}$$ with each other. The angles of reflection and refraction are $$r$$ and $$r’$$ The critical angle is

A ray of light from a denser medium strike a rarer medium at an angle of incidence $$i$$ (see Fig). The reflected and retracted rays make an angle of $${{{90}^ \circ }}$$ with each other. The angles of reflection and refraction are $$r$$ and $$r’$$ The critical angle is

Practice More Releted MCQ Question on
Ray Optics

Practice More MCQ Question on Physics Section

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

Releted MCQ Question on Optics and Wave >> Ray Optics

When a ray of light enters a glass slab from air,

A glass prism of refractive index 1.5 is immersed in water (refractive index $$\frac{4}{3}$$ ). A light beam incident normally on the face $$AB$$ is totally reflected to reach on the face $$BC$$ if

A ray of light from a denser medium strike a rarer medium at an angle of incidence $$i$$ (see Fig). The reflected and retracted rays make an angle of $${{{90}^ \circ }}$$ with each other. The angles of reflection and refraction are $$r$$ and $$r’$$ The critical angle is

A ray of light from a denser medium strike a rarer medium at an angle of incidence $$i$$ (see Fig). The reflected and retracted rays make an angle of $${{{90}^ \circ }}$$ with each other. The angles of reflection and refraction are $$r$$ and $$r’$$ The critical angle is

Practice More Releted MCQ Question on Ray Optics

Practice More MCQ Question on Physics Section

Releted MCQ Question on
Optics and Wave >> Ray Optics

Practice More Releted MCQ Question on
Ray Optics