JAMB - Physics (1982 - No. 18)

If the refractive index of a medium is \(\sqrt{2}\), what is the critical angle?
45o
50o12'
56o25'
75o
90o

Explanation

sin C = \(\frac{1}{n}\) ; sin C = \(\frac{1}{√2}\)

C = sin-1\(\frac{1}{√2}\)

= 45o

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