Question on: WAEC Physics - 2002
The refractive index of a medium relative to air is 1.8. Calculate to the nearest degree, the critical angle for the medium
A
68o
B
56o
C
34o
D
18o
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Correct Option: C
c = (\sin^{-1} \frac{1}{n} = \sin^{-1} \frac{1}{1.8} = 34^o)
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