The refractive index
The refractive index The refractive index:-- When a ray of light travels from one transparent medium into another medium, the change of direction takes place in a given pair of media is called as refractive index. the refractive index can be linked with the important physical quantity, the relative speed of propagation of light in different media. It means speed of light propagates with different speeds in different media. Speed of light is faster in vacuum with speed of 3 * 10 8 meters/second. but in the air, the speed of light is 2.98 * 10 8 meters/second. It means speed of light in air is compared less as compared with speed of light in the vacuum. And the speed of light in glass and water is less than the speed of light in vacuum. The refractive index determine the path of light is bent or refracted, when entering any medium. The refractive index is expressed as the degree of the change of direction of the ligh