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Solution - Refraction of Light - Refractive Index

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Question

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.

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The absolute refractive indices of glass and water are 4/3 and 3/2, respectively. If the speed of light in glass is 2 × 108 m/s, calculate the speed of light in

(a) vacuum (b) water

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The absolute refractive indices of two media 'A' and 'B' are 2.0 and 1.5 respectively. If the speed of light in medium 'B' is 2 × 108 m/s, calculate the speed of light in:

(i) vacuum,

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

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A ray of light travelling in air enters obliquely into water. Does the light ray bend towards the normal or away from the normal? Why?

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Find out, from Table, the medium having highest optical density. Also find the medium with lowest optical density.

Material

 

medium

Refractive indexMaterial mediumRefractive

 

index

Air1.0003Canada Balsam1.53
Ice1.31
Water1.33Rock salt1.54
Alcohol1.36
Kerosene1.44Carbon disulphide1.63
Fused

 

quartz

1.46Dense

 

flint glass

1.65
Turpentine oil1.47Ruby1.71
Benzene1.50Sapphire1.77
Crown

 

glass

1.52Diamond2.42
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