Question

find the absolute refractive index of a medium in which light travels with a speed of 1.4*10^8m/s (b) how do we distinguish a medium to be rarer or denser ? Give two reason

Answer 1

Answer:

Explanation:

Answer

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 ligh