Snell's Law and Refractive Index

Q.

Speed of light in air is $3\times {10}^{8}m/s$ and speed of light in common glass is $2\times {10}^{8}m/s$.Calculate the refractive index of glass.

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 refractive index of water and glass are 1.2 and 1.5 with respect to air, respectively. Calculate the refractive index of glass with respect to water. (Take speed of light in air, c = 3 × 108 m/s)

1. 1.75
2. 1.5
3. 1.25
4. 2

Q. The refractive index of air, water, diamond and crown glass is 1.0003, 1.33, 2.42 and 1.52 respectively. In which medium the speed of light would be the slowest?

1. Water
2. Air
3. Crown glass
4. Diamond

Q.

It is given that the value of $\frac{sini}{sinr}$ when light enters from medium P to medium Q is less than 1.Then

1. P is optically denser than Q

2. P and Q have same optical density

3. Not possible

4. Q is optically denser than P

Q. On a glass plate a light wave is incident at an angle of ${60}^{\circ }$. If the reflected and the refracted waves are mutually perpendicular, the refractive index of material is

1. $\frac{\sqrt{3}}{2}$
2. $\sqrt{3}$
3. $\frac{3}{2}$
4. $\frac{1}{\sqrt{3}}$

Q. The bending of a light ray on changing the medium is called:

1. Refraction
2. Dispersion
3. Diffraction
4. Reflection

Q.

With respect to air, the refractive index of ice is 1.31 and that of rock salt is 1.54.Calculate the refractive index of rock salt with respect of ice.

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

Q. When a light ray passes from a denser medium to a rarer medium, it travels in a straight path without bending.

1. False
2. True

Q. The refractive index of air, water, diamond and crown glass is 1.0003, 1.33, 2.42 and 1.52 respectively. In which medium the speed of light would be the slowest?

1. Crown glass
2. Diamond
3. Water
4. Air

Q. The bending of a light ray on changing the medium is called:

1. Reflection
2. Dispersion
3. Refraction
4. Diffraction

Q. When a light ray passes from a denser medium to a rarer medium, it travels in a straight path without bending.

1. True
2. False

Q. A ray of light is incident on a set of media at an angle 60°. The angle of refraction is different for different media as shown.
In which medium the speed of light is slowest?

1. 3
2. 1
3. Same in all
4. 2

Q. Light ray travels from a known medium to an unknown medium. Match the cards for the unknown medium.

1. Denser medium
2. 
3. Rarer medium
4. 
5. 
6. Same medium