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Question on: WAEC Physics - 2010

From the diagram, the correct equation for the refractive index n of the medium is
A
n = tan i
B
n = \(\frac{sin i}{sin 90^o}\)
C
n = \(\frac{sin i}{cos (90^o - i)}\)
D
n = sin 90oC
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Correct Option: B

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