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Snell's Law and Refractive Index

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Question

With respect to air,the refractive index of ice is 1.31 and that of rock salt is 1.54.Calculate the refractive index of rock salt with respect of ice.

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Solution

Refractive index of ice w.r.t. air
Î¼_ice = 1.31
Refractive index of salt w.r.t. air
Î¼_salt = 1.54
Refractive index of salt w.r.t. ice
Î¼ = 1.54/1.31 = 1.18

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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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