Advertisements
Advertisements
Question
If the refractive index for light going from air to diamond be 2.42, what will be the refractive index from light going from diamond to air?
Solution
Here,
`""^(air)n (diamond)=2.42`
`^(diamond)n air =1/((airn diamond))=1/2.42=0.41`
APPEARS IN
RELATED QUESTIONS
The velocity of light in a medium is 1.5 x 108 m/s. What is the refractive index of the medium with respect to air, if the velocity in air is 3 x 108 m/s?
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 |
The speed of light in air is 3 × 108 m/s. In medium X its speed is 2 × 108 m/s and in medium Y the speed of light is 2.5 × 108 m/s Calculate:
(a) air nx
(b) air nY
(c) x nY
The speed of light in water is 2.25 × 108 m/s. If the speed of light in vacuum be 3 × 108 m/s, calculate the refractive index of water.
State and explain the laws of refraction of light with the help of a labelled diagram.
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.
The refractive indices of water and glass with respect to air are 4/3 and 3/2 respectively. If the speed of light in glass is 2 × 108ms−1, find the speed of light in (i) air, (ii) water.
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?
Match the pair:
Group 'A' | Group 'B' | |
Substance | Refractive index | |
Air | (a) | 1.33 |
(b) | 1.46 | |
(c) | 1.0003 |
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.