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For total internal reflection to occur, which condition must be satisfied?

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For total internal reflection to occur, which condition must be satisfied? (a) N1 = N2 (b) N1 > N2 (c) N1 < N2 (d) N1 x N2=1 This question was posed to me in exam. This interesting question is from Refractive Index and Numerical Aperture topic in chapter EM Wave Propagation of Electromagnetic Theory Select the correct answer from above options Electromagnetic Theory questions and answers, Electromagnetic Theory questions pdf, Electromagnetic Theory question bank, Electromagnetic Theory questions and answers pdf, mcq on Electromagnetic Theory pdf,electromagnetic theory book pdf,electromagnetic theory pdf notes,electromagnetic theory lecture notes,electromagnetic theory of light,maxwell electromagnetic theory,electromagnetic theory proposed by,electromagnetic theory engineering physics,electromagnetic theory nptel

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