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        There is a prism with refracting index equal to √2 and the refracting angle equal to 30 degree. One of the refracting surface of the prism is  polished. A beam of monochromatic light will retrace its path if its angle of incidence over the first refracting surface of the prism is?? A) 0 B) 30 C) 45 D) 60
2 years ago

Arun
23506 Points
							Dear Nikita Angle A = 30°$\mu$ = $\sqrt$2i2 = 0°Because the retracted ray retraces its pathr2 = 0°r1 + r2 = AHencer1 = 30° $\mu$ = sin i1/ sin r1$\sqrt$2 = sin i1/ sin r1sin i1 = $\sqrt$2 * (1/2)sin i1 = 1/$\sqrt$2Hencei1 = 45° RegardsArun (askIITians forum expert)

2 years ago
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• 18 Video Lectures
• Revision Notes
• Test paper with Video Solution
• Mind Map
• Study Planner
• NCERT Solutions
• Discussion Forum
• Previous Year Exam Questions