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प्रश्न
How is the refractive index of a material related to the speed of light in it?
उत्तर
The refractive index is the ratio of speeds of light in the two mediums.
The refractive index of medium 2 with respect to medium 1 is equal to the ratio of speeds of light in medium 1 and in medium 2.
`1^2n=v_1/v_2`
`v_1`=Speed of light in medium 1
`v_2`=Speed of light in medium 2
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संबंधित प्रश्न
How refraction of light is related to refractive index?
Refractive indices of carbon disulphide and ethyl alcohol are 1.63 and 1.36 respectively. Which is optically denser?
State and explain the laws of refraction of light with the help of a labelled diagram.
The refractive index of water is:
(a) 1.33
(b) 1.50
(c) 2.42
(d) 1.36
The following table gives the refractive indices of a few media:
| 1 | 2 | 3 | 4 | 5 | |
| Medium | Water | Crown glass | Rock salt | Ruby | Diamond |
| Refractive index | 1.33 | 1.52 | 1.54 | 1.71 | 2.42 |
Use this table to give an example of:
(i) a medium pair so that light speeds up when it goes from one of these medium to another.
(ii) a medium pair so that light slows down when it goes from one of these medium to another.
Fill in the blank and Explain the completed sentences.
Refractive index depends on the ______ of light.
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 ______.
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 diamond.
What happens when a light ray passes from a rarer medium to a denser medium?
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.
