Question

। If the speed of light in vacuum is 3x108m/s, what will be the absolute refractive index of a medium in which light travel with a speed of 1*108 m/s is
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Answer 1

Answer:

So, the absolute refractive index of a medium is 2.14.

Explanation:

Laws of refraction of light:

First law : The incident ray, the refracted ray, and the normal at the point of incidence all line in the same plane.

Second law (Sell's law): The ratio of sine of angle of incidence to the sine of angle of refraction is a constant for a given pair of media.

i.e,.

sinr

sini

=Constant

Speed of light in vacuum, c=3×10

8

m/s

Speed of light in medium, v=1.4×10

8

m/s

Absolute refractive index =

Speed of light in medium

Speed of light in vacuum

=

1.4×10

8

m/s

3×10

8

m/s

=2.14