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Please anyone tell me about refractive index . Explain about it

Answer» Refractive index is the extent of bending of ray of light by the medium. It does not have any SI unit as when we we will define it in realtion to speed we will get the no units because i.e.,in relation to speed Refractive index. =speed of light in medium 1/speed of light in medium 2We knew SI unit of speed is m per second so it will cancell out we will not get any unit .thus, it does not have unit. The symbol of refractive index is nu(n) its not \'n\' alphabet ,the first line of n alphabet is little bit smaller then second line of n alphabet. Factors on which refractive index depend--1. Nature --whether the object is transparent or not it is not then no bending of light take place as there is not refraction taking place. 2. Wavelength -- Refractive index is inversionaly proportional to wave length, more will be the wavelength less will be the refractive index and vice versa. 3.colour -- red light has highest wavelength so it shows less bending due less refractive index and more wavelength.Violet colour of light shows maximum bending due to less wavelength. Refractive index of air and vaccum is same - 1.00Diamond had the refractive index of- 2.42
The ratio of the velocity of light in vaccum with the ratio of velocity of light in specified medium is known as refractive index.
Refractive Index\tThe extent of the change in direction that takes place in a given pair of media is expressed in terms of the refractive index.\tIt turns out that light propagates with different speeds in different media.\tThe value of the refractive index for a given pair of media depends upon the speed of light in the two media.\tn21 = Speed of light in medium 1 /Speed of light in medium 2 = v1/v2


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