Define heat.write the
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Refractive Index (Index of Refraction) is a value calculated from the ratio of the speed of light in a vacuum to that in a second medium of greater density. Laws of refraction state that:
a) The incident ray, reflected ray and the normal, to the interface of any two given mediums; all lie in the same plane.
b) The ratio of the sine of the angle of incidence and sine of the angle of refraction is constant.
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