relationship between refractive index and angle of refraction
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Refraction of light at the interface between two media of different refractive indices, with n2 > n1. Since the velocity is lower in the second medium (v2 < v1), the angle of refraction θ2 is less than the angle of incidence θ1; that is, the ray in the higher-index medium is closer to the normal.
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refraction is the change in direction of a wave passing from one medium to another or from a gradual change in the medium.
refractive index or index of refraction of a material is a dimensionless number that describes how fast light travels through the material. It is defined as. where c is the speed of light in vacuum and v is the phase velocity of light in the medium.
Total internal reflection when refraction reflection at critical angle and refraction takes place called TIR
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