A ray of light makes an angle of incidence of 40° on one face of a fused quartz rod (n = 1.47) from the air (n = 1) and strikes the second surface of the quartz as shown. The light will exit the second surface of quartz with an angle (to the normal of the second surface) of: 40° 38 87 43° O 50° O Light will not exit from the second surface and will be totally reflected at that surface.
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