calculate the speed of light in medium ,whose critical angle is 9°
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n= 1/sinC = 1/sin45° = √2
Therefore speed of light in vaccum = speed of light in air/n = 3×10^8/1.414 = 2.121×10^8 m/s
Therefore speed of light in vaccum = speed of light in air/n = 3×10^8/1.414 = 2.121×10^8 m/s
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sin9°=1/u
u=1/sin9°=2.42
u=1/sin9°=2.42
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