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प्रश्न
Find out, from Table, the medium having highest optical density. Also find the medium with lowest optical density.
| Material medium | Refractive index | Material medium | Refractive index |
| Air | 1.0003 | Canada Balsam | 1.53 |
| Ice | 1.31 | – | – |
| Water | 1.33 | Rock salt | 1.54 |
| Alcohol | 1.36 | – | – |
| Kerosene | 1.44 | Carbon disulphide | 1.63 |
| Fused quartz | 1.46 | Dense flint glass | 1.65 |
| Turpentine oil | 1.47 | Ruby | 1.71 |
| Benzene | 1.50 | Sapphire | 1.77 |
| Crown glass | 1.52 | Diamond | .42 |
उत्तर
- The medium with maximum optical density is diamond whose refractive index is 2.42.
- The medium with minimum optical density is air whose refractive index is 1.0003.
- The optical density of a medium is directly related to the refractive index of that medium. A medium with the highest refractive index will have the highest optical density and vice versa.
- It can be observed from the table that diamond and air, respectively, have the highest and lowest refractive index. Therefore, diamond has the highest optical density and air has the lowest optical density.
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संबंधित प्रश्न
How refraction of light is related to refractive index?
If the refractive index of glass for light going from air to glass is 3/2, find the refractive index of air for light going from glass to air.
A ray of light travelling in water falls at right angles to the boundary of a parallel-sided glass block. The ray of light:
(a) is refracted towards the normal
(b) is refracted away from the normal
(c) does not get refracted
(d) is reflected along the same path
Which has higher refraction index : water of glass?
The refractive index of diamond is 2.42. What is the meaning of this statement in relation to the speed of light?
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).
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(c) `4/6`
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(a) substance P
(b) substance Q
(c) substance R
(d) substance S
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.
If the refractive index of air with respect to glass is 2/3. What is the refractive index of glass with respect to air?
Refractive index of air : 1.0003 : : refractive index of water : _______
Purple has the lowest refractive index.
Define the refractive index of a medium.
A light ray enters from medium A to medium B as shown in figure. The refractive index of medium B relative to A will be ______.
Absolute refractive indices of glass and water are `3/2 and 4/3` respectively. If the speed of light in glass is 2 × 108 m/s, the speed of light in water is ______.
