Question

5. a) Define refractive Index (1)​

Answer 1

refractive index refers to the speed of light in that medium with respect to speed if light in vaccum

Answer 2

Answer:

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❥Refractive index is measure of the bending of a ray of light when passing from one medium into another. If i is the angle of incidence of a ray in vacuum and r is the angle of refraction the refractive index n is defined as the ratio of the sine of the angle of incidence to the sine of the angle of refraction; i.e., n = sin i / sin r.