A) \[\mu =\frac{\sin \,i}{\sin \,r}\]
B) \[\mu =\tan \,{{\theta }^{o}}\]
C) \[\mu =\cos \theta \]
D) \[\mu =sin\theta \]
Correct Answer: B
Solution :
From Brewster's law \[\mu =\tan \,\,{{\theta }_{P}}\]
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