If the refractive index of crown glass is 1.51, its critical angel is.
PHYSICS
JAMB 2009
If the refractive index of crown glass is 1.51, its critical angel is.
- A) 48.6°
- B) 22.5°
- C) 41.5°
- D) 45.0°
Correct Answer: C) 41.5°
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