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| Numerical - 30 |
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| 30. The critical angle of incidence of water for total internal reflection is 480 for a certain wavelength. What is the polarizing angle and the angle of refraction for light on water at this angle? |
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| Suggested solution: |
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| Let m be the refractive index of water with respect to air and io the critical angle. Then, |
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| Let ip be the polarizing angle of incidence. From Brewster's law, |
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| tan ip = = 1.345 |
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| or |
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| ip = tan-1 (1.345) = 53022' |
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| At polarizing angle of incidence, if r is the angle of refraction, |
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