Total Internal Reflection

How critical angle is related with refractive index?

What is an optical fibre? Explain how does an optical fibre work.

Determine the critical angle, if absolute refractive index of water is $\frac{4}{3}$.

The mirage is occurring as the refractive index increases with height.

Explain the formation of mirage and its relation with refractive index.

What is mirage? How does it occur?

All organs of our body cannot be seen by naked eye. Optical fibre can be used to see the internal organs. An optical fibre cable is inserted into our stomach and light will be sent down through an optical fibre by the phenomenon called _____ of light. (total internal reflection / total internal refraction)

Optical fibre can be used to:

The signals for the communication are passed through an optical fibre cable by the phenomenon called _____ of light. (total internal reflection/ total internal refraction)

The signals are passed through an optical fibre cable by the phenomenon called dispersion of light.

The refractive index of a medium decreases with increase in the temperature of the medium.

Mirage is an example of _____ reflection.

At critical angle of incidence, the angle of refraction is _____ degree.

Total internal reflection takes place when the light ray travels from

The refractive index of glass with respect to air is $2$. Then the critical angle of glass-air interface is

Which one has the highest value of critical angle?

The reason for brilliance of diamonds is total internal reflection of light.

For _____ to occur, light should travel from denser medium to rarer medium.
(Choose from: refraction / reflection / total internal reflection)

In deserts, a person often see a pool of water at a distance. Give the name of this phenomenon.

Total internal reflection only takes place when the angle of incidence is greater than the _____ angle.