# Solution - Refraction of Light - Refractive Index

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ConceptRefraction of Light - Refractive Index

#### Question

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?

#### Solution

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How refraction of light is related to refractive index?

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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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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 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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You are given kerosene, turpentine and water. In which of these does the light travel fastest? Use the information given in Table.

 Materialmedium 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 Fusedquartz 1.46 Denseflint glass 1.65 Turpentine oil 1.47 Ruby 1.71 Benzene 1.50 Sapphire 1.77 Crownglass 1.52 Diamond 2.42
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#### Content BooksVIEW ALL [1]

Solution for concept: Refraction of Light - Refractive Index. For the course 9th - 10th SSC (English Medium)
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