A laser beam enters one of the sloping faces of the equilateral glass prism 1n = 1.422
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A laser beam enters one of the sloping faces of the equilateral glass prism 1n = 1.422 in FIGURE 26-69 and refracts through the prism. Within the prism the light travels horizontally. What is the angle u between the direction of the incident ray and the direction of the outgoing ray?
In figure 26-69
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