Absolute Refractive Index

Q. The refracted ray of light bends towards the normal when passing from a rarer to a denser medium.

1. True
2. False

Q.

The Refractive index of glass with respect to water is (9/8) . The Refractive index of glass with respect to air is (3/2). Find the refractive index of water with respect to air.

Q.

The ratio of the refractive index of red light to blue light in air is

1. Greater than unity

2. Equal to unity

3. Less than unity

4. Less as well as greater than unity depending upon the experimental arrangements.

Q.

A boy uses the blue colour of light to find the refractive index of glass. He then repeats the experiment using the red colour of light. Will the refractive index be the same or different in the two cases? Give a reason to support your answer.

Q.

A Youngs double-slit set up for interference is shifted from air to within water, then the fringe width.

1. Becomes infinite

2. decreases

3. increases

4. remains unchanged

Q.

In an experiment of finding the refractive index of glass, if blue light is replaced by the red light, how will the refractive index of glass change? Give reason in support of your answer.

Q. The refracted ray of light bends towards the normal when passing from a rarer to a denser medium.

1. True
2. False

Q.

What happens if the ray of light goes from an optical rare medium to a denser medium?

Q. Derieve the expression for refraction of light from denser to rarer medium.

Q.

What happens to the speed of light when a light ray goes from an optically rarer medium to an optically denser medium?

Q. Refractive index of glass with respect to water is 1.125. If the absolute refractive index of glass is 1.5, find the absolute refractive index of water.

1. 1.33
2. 1.7
3. 1.9
4. 1.5

Q.

The twinkling of stars at night is due to

1. Continuous change in the intensity of glow of the star

2. None of the above

3. Continuous change in the actual position of the start

4. Continuous change in the refractive index of air layers

Q. The refractive index of glass with respect to air is $3/2$. The refractive index of air with respect to glass will be :

1. $1$
2. $3/2$
3. $2$
4. $2/3$

Q.

Question 5
The refractive index of diamond is 2.42. What is the meaning of this statement?

Q. When light travels from a rarer to a denser medium, it bends the normal.

1. towards
2. away from
3. along

Q.

Question 24
Refractive index of diamond with respect to glass is 1.6 and absolute refractive index of glass is 1.5. Find out the absolute refractive index of a diamond.

Q.

(i) What is refraction?

(ii) How can sunrise and sunset be thought of as an example of refraction?

Q. Rakesh did an experiment in which he kept his pencil inside a glass of water. He observed that the pencil bent along its length inside the water. He repeated the experiment by changing the medium to oil and glycerine and noticed the same observation but the amount of bending was different in each case.

If the refractive index of water, oil and glycerine is 1.33, 1.47 and 1.40 respectively, then in which medium did the light ray bend the least?

1. Water
2. Glass
3. Oil
4. Same in all the medium.

Q. (i) How does the refractive index of a medium depend on the (a) wavelength of light used and (b) temperature of the medium?

(ii) In an experiment of finding the refractive index of glass, if blue light is replaced by the red light, how will the refractive index of the glass change? Give reason in support of your answer.

Q. In which of the following images, the angle of refraction is maximum?

1. 
2. 
3. 
4. 

Q. Rakesh did an experiment in which he kept his pencil inside a glass of water. He observed that the pencil bent along its length inside the water. He repeated the experiment by changing the medium to oil and glycerine and noticed the same observation but the amount of bending was different in each case.

The amount of bending was different in each media because they have:

1. different mass density
2. different refractive index
3. different volume
4. different size of particles

Q. Question 24
Refractive index of diamond with respect to glass is 1.6 and absolute refractive index of glass is 1.5. Find out the absolute refractive index of a diamond.

Q. What do you mean by refraction of light? In which direction will light bend when travelling from an optically rarer medium to an optically denser medium?

Q. When light travels from a rarer to a denser medium, it bends the normal.

1. towards
2. away from
3. along

Q. Rakesh did an experiment in which he kept his pencil inside a glass of water. He observed that the pencil bent along its length inside the water. He repeated the experiment by changing the medium to oil and glycerine and noticed the same observation but the amount of bending was different in each case.

On looking from the top, Rakesh found that the bottom of the glass appeared _________.

1. shallower
2. deeper
3. at same depth
4. can't say

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

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.

Absolute refractive index of glass is $1.5$ and refractive index of glass with respect to water is $1.125$. The absolute refractive index of water is ______

1. $1.5$

2. $1.33$

3. $1.7$

4. $1.9$

Q.

Which of the following statement is incorrect regarding refractive index?

1. Speed of light is inversely proportional to refractive index.

2. Refractive index of vacuum is 1.

3. A lower refractive index means optically rarer medium.

4. Speed of light is directly proportional to refractive index.

Q.

define refraction of light?