Question

state the law of refraction of light.Explain the term absolute refractive index of a medium and write an expression to relate it with the speed of light in vacuum​

Answer 1

There are 2 laws of refraction of light

That are... 1.SINi/SINr=constant

2. Incident ray refracted ray and normal all lie on the same plane

The term absolute refractive index is the ratio of speed of light in medium with respect to the speed of light in vaccum or air
That is.... n=speed of light in medium/Speed of light in vaccum

Answer 2

law of refraction is
the ratio between sin angle i/sin angle r =constant term
the refracted ray incident ray and normal lie on the same plane
refractive index= speed of light in air /speed of light in glass
speed of light in air is always given 3*10to the power 8