Relative Refractive Index

Q.

The refractive index of dense flint glass is 1.65 and that of alcohol is 1.36 both with respect to air. What is the refractive index of flint glass with respect to alcohol?

Q.

A ray of light is incident at the glass–water interface at an angle $i$, if it emerges finally parallel to the surface of the water, then the value of ${\mu }_g$ would be

1. $\left(\frac{4}{3}\right)sini$

2. $\frac{1}{sini}$

3. $\frac{4}{3}$

4. $1$

Q. If the speed of light in a medium is $1.5\times {10}^8$ m/s, is the absolute refractive index of the medium.

1. $1$
2. $2$
3. $3$

Q. Refractive index of diamond is 2.42 and that of glass is 1.5. Calculate the sine of critical angle for the diamond-glass surface.

Q.

The refractive index of dense flint glass is 1.65 and that of alcohol is 1.36, both with respect to air. What is the refractive index of flint glass with respect to alcohol?

Q. Refractive index of diamond is 2.42 and that of glass is 1.5. Calculate the sine of critical angle for the diamond-glass surface.

Q.

When light is incident on the surface of medium at angle $i$ and refracted into a second medium at an angle $r$ the graph of $sini$ vs $sinr$ is as shown in the graph. From this, one can conclude that

1. Velocity of light in the medium II is 1.73 times the velocity of light in the I medium

2. Velocity of light in the I medium is 1.73 times the velocity in the II medium

3. Medium II is optically denser than medium I

4. $sin{i}_c=\frac{1}{2}$

Q. With respect to air, the refractive index of a flint glass and alcohol is $1.65$ and $1.36$ respectively. Calculate the refractive index of the flint glass with respect to alcohol.

1. 1.21

Q.

If the refractive index of a dense flint glass is $1.65$ and of alcohol is $1.36$ with respect to air, then the refractive index of the dense flint glass with respect to alcohol is

1. 1.31

2. 1.21

3. 1.11

4. 1.01

Q.

The critical angle for diamond $(refractiveindex=2.4)$ is

1. ${28.62}^{\circ }$

2. ${25.62}^{\circ }$

3. ${23.62}^{\circ }$

4. ${24.62}^{\circ }$

Q.

Refractive index of water is $\frac{4}{3}$ and of glass is $\frac{3}{2}$. What is the refractive index of glass w.r.t water?

1. $\frac{8}{11}$

2. $\frac{9}{8}$

3. $\frac{11}{8}$

4. $\frac{8}{9}$

Q.

The critical angle for diamond $(refractiveindex=2.4)$ is

1. ${28.62}^{\circ }$

2. ${25.62}^{\circ }$

3. ${23.62}^{\circ }$

4. ${24.62}^{\circ }$

Q.

If the refractive index of a dense flint glass is $1.65$ and of alcohol is $1.36$ with respect to air, then the refractive index of the dense flint glass with respect to alcohol is

1. 1.31

2. 1.21

3. 1.11

4. 1.01

Q. If c is the speed of light in vacuum and v is the speed of light in the given medium, the absolute refractive index(n) of a medium is given as .

1. $v=c\times n$
2. $n=c\times v$
3. $n=\frac{c}{v}$
4. $n=\frac{v}{c}$

Q. The more the refractive index of a medium, the more is the lateral displacement of light ray in the medium.

1. True
2. False

Q.

The relative refractive index can be:

1. equal to 1

2. greater than 1

3. smaller than 1

4. none of these

Q.

A ray of light is incident on a glass-water interface at an angle i, it merges finally parallel to the surface of the water as shown in the figure, the value of ${\mu }_g$ would be:

1. (4/3) sin i

2. 1 /sin i

3. 4/3

4. 1

Q.

Which of the following statement is incorrect regarding refractive index?

1. Speed of light is inversely proportional to refractive index

2. Speed of light is directly proportional to refractive index

3. Refractive index of vacuum is 1

4. A lower refractive index means optically rarer medium

Q.

A beam of light is traveling from Region I to Region IV (refer figure). The refractive index of Region I, II, III and IV are $n_0,\frac{n_0}{2},\frac{n_0}{6}and\frac{n_0}{8}$ respectively. The angle of incidence $\theta$ for which the beam just misses entering Region IV is:

1. ${\text{sin}}^{-1}\left(\frac{3}{4}\right)$

2. ${\text{sin}}^{-1}\left(\frac{1}{8}\right)$

3. ${\text{sin}}^{-1}\left(\frac{1}{4}\right)$

4. ${\text{sin}}^{-1}\left(\frac{1}{3}\right)$