A beam of light is propagating through a diamond (n1= 2.42) and strikes a diamond- air interface at an angle of incidence of 30°. (a) Will part of the beam enter the air (n2 = 1.00) or will the beam be totally reflected at the interface? (b) Repeat part (a), assuming that the diamond is surrounded by water (n2= 1.33) instead of air.

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Dispersion of White Light

Snell’s law is a formula that gives a relation between the angle of incidence and angle of refraction and is given as: