List of top Physics Questions on Total Internal Reflection

A small bulb is placed at the bottom of a tank, containing a transparent liquid of refractive index \(\sqrt{2}\), to a depth of \(1\,\text{m}\). Calculate the area of the surface of the liquid through which light from the bulb emerges.

In which of the following, total internal reflection does not occur ?

State the two conditions under which total internal reflection occurs.

A transparent container contains layers of three immiscible transparent liquids \(A\), \(B\) and \(C\) of refractive indices \(n\), \(\dfrac{3n}{4}\) and \(\dfrac{2n}{3}\), respectively. A laser beam is incident at the interface between \(A\) and \(B\) at an angle \(\theta\) as shown in the figure. Prove that the beam does not enter region \(C\) at all for \[ \sin\theta>\frac{2}{3}. \]

A ray of light is travelling through a rectangular glass slab (refractive index \(\frac{3}{2}\)) and is incident on the horizontal glass-air surface at the critical angle for the two media. The slab is then brought in contact with water (refractive index \(\frac{4}{3}\)) such that a thin horizontal layer of water is formed on the surface of the slab. Find the angle at which the ray will emerge into air from the water-air surface.

State the two conditions under which total internal reflection occurs.

A transparent container contains layers of three immiscible transparent liquids \(A\), \(B\) and \(C\) of refractive indices \(n\), \(\dfrac{3n}{4}\) and \(\dfrac{2n}{3}\), respectively. A laser beam is incident at the interface between \(A\) and \(B\) at an angle \(\theta\) as shown in the figure. Prove that the beam does not enter region \(C\) at all for \[ \sin\theta>\frac{2}{3}. \]

A ray of light is travelling through a rectangular glass slab (refractive index \(\frac{3}{2}\)) and is incident on the horizontal glass-air surface at the critical angle for the two media. The slab is then brought in contact with water (refractive index \(\frac{4}{3}\)) such that a thin horizontal layer of water is formed on the surface of the slab. Find the angle at which the ray will emerge into air from the water-air surface.

Arrange the following in the correct order as the angle of incidence in a denser medium is gradually increased. (A) The refracted ray bends away from the normal. (B) The refracted ray grazes along the surface of separation. (C) The light is totally reflected back into the denser medium. (D) The ray passes undeviated when incident normally. Choose the correct answer from the options given below:

Light is incident on an interface between water (refractive index \(=1.33\)) and glass (refractive index \(=1.5\)). For total internal reflection, light should be travelling from \[ (i_c \text{ is the critical angle}) \]

The critical angle of incidence \(i_c\) for a ray incident from a denser to rarer medium, is that angle for which

Which of the following statements are correct?
(A) Total internal reflection occurs when a ray of light travels from a rarer transparent medium to a denser medium.
(B) In total internal reflection, the incident ray of light remains in the same medium after reflection.
(C) In total internal reflection, the angle of incidence inside the denser transparent medium is equal to the angle of reflection in the same medium.
(D) In total internal reflection inside a denser medium there is no angle of refraction
Choose the correct answer from the options given below:

Light is traveling from one medium to another medium as given in the options. In which of the following options total internal reflection will be possible?

In total internal reflection when the angle of incidence is equal to the critical angle for the pair of media in contact, what will be angle of refraction?