The refractive index of a medium relative to air is 1.8. Calculate the critical angle
PHYSICS
WAEC 1996
The refractive index of a medium relative to air is 1.8. Calculate the critical angle for the medium to the nearest degree.
- A. 18°
- B. 34°
- C. 45°
- D. 68°
Correct Answer: B. 34°
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