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प्रश्न
A ray of light is incident on the face of an equilateral prism at angle of 90°. The ray gets totally reflected on the second refracting face. The total deviation produced in the path of ray is:
पर्याय
60°
90°
120°
180°
MCQ
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उत्तर
120°
Explanation:
The ray enters normally and travels undeviated inside the prism. It undergoes total internal reflection at the second face and emerges from the other face, producing a total deviation of 120°. The other listed angles are not the deviation for this path.
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