4. A parallel beam of light containing two wavelengths, !1 = 465nm and !2 = 652nm , enters the silicate flint equilateral prism at an angle of incidence of 45o, as shown below.
At what angle does each beam leave the prism (measured with respect to the perpendicular to the face at the point of emergence from the glass)? The corresponding indices of refraction are 1.642 and 1.619. Clearly show the paths if of the beam through the prism and as they emerge into air on the other side.
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