हिंदी

If the refractive index of air with respect to glass is 2/3. What is the refractive index of glass with respect to air? - Science and Technology 1

Advertisements
Advertisements

प्रश्न

If the refractive index of air with respect to glass is 2/3. What is the refractive index of glass with respect to air?

विकल्प

  • 2/3

  • 3/2

  • 1/3

  • 1/2

MCQ
रिक्त स्थान भरें

उत्तर

3/2

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 6: Refraction of light - Choose the correct option.

APPEARS IN

संबंधित प्रश्न

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


Which of the following diagrams shows the ray of light refracted correctly?


How is the refractive index of a material related to the speed of light in it? 


Give three examples of materials that refract light rays. What happens to the speed of light rays when they enter these materials?


Define Snell's law of refraction. A ray of light is incident on a glass slab at an angle of incidence of 60°. If the angle of refraction be 32.7°, calculate the refractive index of glass. (Given : sin 60° = 0.866, and sin 32.7° = 0.540).


The speed of light in vacuum and in two different glasses is given in the table below:  

Medium Speed of light
Vacuum 3.00 × 108 m/s
Flint glass 1.86 × 108 m/s
Crown glass 1.97 × 108 m/s


(a) Calculate the absolute refractive indexes of flint glass and crown glass.
(b) Calculate the relative refractive index for light going from crown glass to flint glass.


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 indices of four materials A, B, C and D are 1.33, 1.43, 1.71 and 1.52 respectively. When the light rays pass from air into these materials, they refract the maximum in:

(a) material A
(b) material B
(c) material C
(d) material D


The refractive index of glass for light going from air to glass is  The refractive index for light going from glass to air will be:

(a) `1/3`

(b) `4/5`
(c) `4/6` 
(d) `5/2`


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


Refractive indices of four media A, B, C and D are given below:  

 Medium  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) maximum, and (ii) minimum?


State the laws of refraction of light. Explain the term 'absolute refractive index of a medium' and write an expression to relate it with the speed of light in vacuum.


State Snell’s law of refraction of light. Write an expression to relate refractive index of a medium with speed of light in vacuum.

The refractive index of a medium ‘a’ with respect to medium ‘b’ is 2/3 and the refractive index of medium ‘b’ with respect to medium ‘c’ is 4/3. Find the refractive index of medium ‘c’ with respect to medium ‘a’.


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.


State the law of refraction of light that defines the refractive index of a medium with respect to the other. Express it mathematically. How is refractive index of any medium 'A' with respect to a medium 'B' related to the speed of propagation of light in two media A and B? State the name of this constant when one medium is vacuum or air.

The refractive indices of glass and water with respect to vacuum are 3/2 and 4/3 respectively. If the speed of light in glass is 2 × 108m/s, find the speed of light in (i) vacuum, (ii) water.


Fill in the blank and Explain the completed sentences.
 Refractive index depends on the ______ of light.


If in a medium, the speed of light is 1.5 × 108 m/s how much will the absolute refractive index of that medium be?


The velocity of light in a medium is 1.5 x 188 m/s. What is the refractive index of the medium with respect to air, if the velocity in the air is 3 x 108 m/s?


_______ is the unit of refractive index.


n = _______. This law is also called as Snell’s law.


Purple has the lowest refractive index.


If the absolute refractive index of glass and water are 3/2 and 4/3 respectively, what is the refractive index of glass with respect to water?


Solve the following example.
Speed in first medium, v1 = 3 × 108 m/s 
Speed in second medium, v2 = 2 × 108 m/s
Then 2n1 = ?


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?


Noor, a young student, was trying to demonstrate some properties of light in her Science project work. She kept ‘X’ inside the box (as shown in the figure) and with the help of a laser pointer made light rays pass through the holes on one side of the box. She had a small butter-paper screen to see the spots of light being cast as they emerged.

If the object inside the box was made of a material with a refractive index less than 1.5 then the ______.


Match the Columns:

Column ‘A’ Column ‘B’
Refractive index of water (a) 1.31
  (b) 1.36
  (c) 1.33

The refractive index of glass with respect to air is `5/4` and the refractive index of water with respect to air is `4/3`. Then what will be the refractive index of glass with respect to water?


A light ray enters from medium A to medium B as shown in the figure.

Which one of the two media is denser w.r.t. other medium? Justify your answer.


A light ray enters from medium A to medium B as shown in the figure.

If the speed of light in medium A is `v_a` and in medium B is `v_b`, what is the refractive index of B with respect to A.


Absolute refractive indices of diamond and water are 2.42 and 1.33 respectively. Find the value of refractive index of water w.r.t. diamond.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×