Prove that when light travels from rarer medium to denser medium it bends away from normal​

Answers (1)

When a ray of light travels from optically denser medium to optically rarer medium, it always bends away from the normal.
According to Snell's Law:


For optically denser medium, refractive index n1​ is greater than that of the rarer medium n2​. Thus, the angle of refraction will be greater than angle of incidence i.e. it bends away from the normal. 

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