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Solution - Refraction of Light - Refractive Index

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Question

The refractive indices of glass and water with respect to air are 3/2 and 4/3 respectively. If speed of light in glass is 2 x 108 m/s, find the speed of light in water.

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

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Solution for concept: Refraction of Light - Refractive Index. For the course 8th-10th CBSE
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