WAEC - Physics (2002 - No. 27) | ExamPlay

WAEC - Physics (2002 - No. 27)

The refractive index of a medium relative to air is 1.8. Calculate to the nearest degree, the critical angle for the medium

68^o

56^o

34^o

18^o

Explanation

c = \(\sin^{-1} \frac{1}{n} = \sin^{-1} \frac{1}{1.8} = 34^o\)

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