Q5) Define Refractive Index and also write its unit
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The Refractive index of the medium is defined as the ratio of speed of light in vacuum to the speed of light in a medium. ... The refractive index don't have any unit because it is the ratio of two similar quantities. The refractive index of glass is more than the refractive index of water.
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The bending phenomenon of light from one medium to another is called as Refractive index .There are no units for the index of refraction, because it is merely a ratio. When you use the formula n=cv
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