What is refractive index? How it is related to the velocity of light? Define Snell's law
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Refractive index - definition
Refractive index of a medium is defined as the ratio of the speed of light in vacuum to the speed of light in air. μ or n=vc. Note: μ≥1. It is usually found using Snell's laws of refraction
Refractive index of a medium is defined as the ratio of the speed of light in vacuum to the speed of light in air.
μ or n= c/v
Note: μ≥1
It is usually found using Snell's laws of refraction.
The speed at which light propagates through materials such as glass or air, is less than c; just as the speed of radio waves in wire cables is slower than c.
The refractive index is the relationship between the speed of light and the speed at which light travels. The refractive index of light in glass is about 1.5 which means that light is 1.5 slower in that medium.
The light changes direction when is incident to another medium at an angle, otherwise, you will not notice.