A Ray of Light Enters an Equilateral Prism Made of Material

question 23

Multiple Choice

A ray of light enters an equilateral prism made of material with n = 1.45.What angle of incidence, $\theta$ ,will cause the internally refracted ray to be parallel to the base of the prism?

• A) 46.5\(^{\circ}\)
• B) 30.0\(^{\circ}\)
• C) 20.2\(^{\circ}\)
• D) 5.70\(^{\circ}\)
• E) this cannot happen

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