Define refractive index? With examole

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Yogita Ingle 5 years, 2 months ago
Refractive index is defined as The ratio of the speed of light in a vacuum to its speed in a specific medium.
Example: The refractive index of glass <i>n</i>g is 1.52 and refractive index of water<i> n</i>w is 1.33. Since the refractive index of glass is higher than the water, the speed of light in water is faster than the speed of light through glass.
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