An isocels prism has one of its refracting surfaces
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An isosceles prism has one of the refracting surfaces silvered. A ray of light is incident normally on the refracting face AB. After two reflections, the ray emerges from the base of the prism perpendicular to it. Find the angle of the prism.
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Answer:
alpha=72°
A(angle of prism) = 36°
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