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प्रश्न
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`
उत्तर
4/6
Explanation:
Refractive index of material 2 with respect to material 1 is given by:
1n2 =`"speed of light in medium 1"/"speed of light in medium 2"`
By the same argument, refractive index of medium 1 with respect to medium 2 is given by:
2n1 = `"speed of light in medium 2"/"speed of lighht in medium 1"`=1/1n2
1n2 is `3/2` therefore, 2n1 will be 1/ `3/2`
Therefore, refractive index of light going from glass to air will be 4/6.
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संबंधित प्रश्न
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.
You are given kerosene, turpentine and water. In which of these does the light travel fastest? Use the information given in Table.
| 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 | 2.42 |
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(a) sulphuric acid
(b) glass
(c) water
(d) carbon disulphide
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If the angle of incidence and angle of emergence of a light ray falling on a glass slab are i and e respectively, prove that, i = e.
Solve the example.
If the absolute refractive indices of glass and water are 3/2 and 4/3 respectively, what is the refractive index of glass with respect to water?
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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.
