Advertisements
Advertisements
Question
Define the term absolute refractive index. The absolute refractive index of diamond is 2.42. What is the meaning of this statement? Refractive indices of media A, B C and D are given below:
|
Media |
Refractive index |
|
A |
1.33 |
|
B |
1.44 |
|
C |
1.52 |
|
D |
1.65 |
In which of these four media is the speed of light (i) minimum and (ii) maximum ?
Find the refractive index of medium C with respect to medium B.
Solution
Absolute refractive index: The refractive index of any medium with respect to the vacuum is called absolute refractive index of that medium.
The absolute refractive index of diamond is 2.42. This means the speed of light in diamond is 2.42 times slower than that in the vacuum.
`n=c/v=2.42`
Absolute refractive index: The refractive index of any medium with respect to the vacuum is called absolute refractive index of that medium.
The absolute refractive index of diamond is 2.42. This means the speed of light in diamond is 2.42 times slower than that in the vacuum.
`n_C/n_B=1.52/1.44=1.055-1.06`
APPEARS IN
RELATED QUESTIONS
The refractive index of diamond is 2.42. What is the meaning of this statement?
A ray of light travelling in air goes into water. The angle of refraction will be:
(a) 90°
(b) smaller than the angle of incidence
(c) equal to the angle of incidence
(d) greater than the angle of incidence
Light enters from air into diamond which has a refractive index of 2.42. Calculate the speed of light in diamond. The speed of light in air is 3.0 × 108 ms−1.
The refractive indexes of four substances P, Q, R and S are 1.77, 1.50, 2.42 and 1.31 respectively. When light travelling in air is incident on these substances at equal angles, the angle of refraction will be the maximum in:
(a) substance P
(b) substance Q
(c) substance R
(d) substance S
The refractive index of water is:
(a) 1.33
(b) 1.50
(c) 2.42
(d) 1.36
Name a liquid whose mass density is less than that of water but it is optically denser than water.
Fill in the blank and Explain the completed sentences.
Refractive index depends on the ______ of light.
Mark the correct answer in the question.
If the refractive index of glass with respect to air is 3/2, what is the refractive index of air with respect to glass?
The refractive index of flint glass is 1.65 and that for alcohol is 1.36 with respect to air. What is the refractive index of the flint glass with respect to alcohol?
What happens when a light ray passes from a rarer medium to a denser medium?
