flat slab of material (nm = 1.8) is d = 0.65 m thick. A beam of light in air (na = 1) is incident on the material with an angle θa = 51 degrees with respect to the surface's normal. Find what is the displacement, D, of the beam when it exits the slab?

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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: