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Light enters at an angle of incidence in a transparent rod, through one end. Refractive index of the material of the rod is 'μ' The light once entered into it will not leave it through its lateral face, whatsoever be the value of angle of incidence, if

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Detailed Solution

sinθc=1μr=900−θcNow, sin900sinr=μ⇒ 1cosθc=μ ⇒ 1−1μ2 = 1μ ⇒ μ=2

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