Refractive Index

Velocity of light is greater in denser medium than in rarer medium.

If a ray is refracted at an angle of $14°$ and the refractive index is $1.2$, then calculate the angle of incidence. Given that $\sin 14°=0.24$.

If the angle of incidence is $90°$, what will be the angle of refraction?

State snell's law.

If the absolute refractive index of glass is $3/2$ and that of water is $5/4$, then find the ratio of speed of light in water and to that in glass.

Light travels from air to glass slab having refractive index of $1.50$. The speed of light in glass will be $\_\_\_\_\_\times {10}^8$ $\mathrm{m}/\mathrm{s}$?

(Speed of light in vacuum is $3\times {10}^8 \mathrm{m}/\mathrm{s}$.)

A piece of diamond is dipped in a liquid of refractive index $1.2$. If the refractive index of diamond is $2.42$, what is the refractive index of the diamond with respect to the liquid?

Light _____ (cannot/ can) travel in vacuum.

The speed of light in air is:

Identify the laws governing the phenomenon that is taking place in the diagram given below:

If the speed of light in a medium is $1.5\times {10}^8 \mathrm{m} {\mathrm{s}}^{-1}$, then what is the absolute refractive index of the medium?

Observe the given figure and fill in the following blank:

The law based on the process represented by the figure states that for a given pair of media, here air and glass, the ratio of $\sin i$ to $\sin r$ is a constant, Here, $i$ is the angle of incidence and $r$ is the angle of _____.

Observe the given figure and fill in the following blank:

The law based on the process represented by the figure states that the incident ray and the _____ ray at the point of incidence N are on the opposite sides of the normal to the surface of the slab at that point i.e.CD, and the three are in the same plane.

The ratio of the speed of light in vacuum to the speed of light in a medium is called the _____ of the medium.

Speed of light in air is $3 \times {10}^8 \mathrm{m} {\mathrm{s}}^{-1}$ and the refractive index of a medium is $1.5$. Find the speed of light in the medium.

Match the following.

The refractive index of water is

The refractive indices of water for red and violet colours are $1.325$ and $1.334$ respectively. Find the difference between the velocities of rays for these two colours in water $(c=3\times {10}^8 \mathrm{m}/\mathrm{s})$

What do you understand by refraction? Write the laws of refraction. Explain refraction through a glass slab.

Write Snell’s Law.