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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. - CBSE Class 10 - Science

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Question

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 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

Solution

In water light travel faster as compare to kerosene and turpentine because the refractive index of water is lower than that of kerosene and turpentine. The speed of light is inversely proportional to the refractive index.

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 NCERT Solution for Science Textbook for Class 10 (2014 to Current)
Chapter 10: Light - Reflection and Refraction
Q: 4 | Page no. 176
Solution You are given kerosene, turpentine and water. In which of these does the light travel fastest? Use the information given in Table. Concept: Refraction of Light - Refractive Index.
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