The refractive index of a medium relative to air is 1.8. Calculate to the nearest
PHYSICS
WAEC 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. 68°
- B. 56°
- C. 34°
- D. 18°
Correct Answer: C. 34°
Explanation
c = \(\sin^{-1} \frac{1}{n} = \sin^{-1} \frac{1}{1.8} = 34^o\)
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