A) sin\[\theta \] \[\ge \] 8/9
B) 2/3 < sin\[\theta \]< 8/9
C) sin \[\theta \] \[\le \] 2/3
D) It is not possible
Correct Answer: A
Solution :
For TIR at AC \[\theta >C\] \[\Rightarrow \sin \theta \ge \sin C\] \[\Rightarrow \sin \theta \ge \frac{1}{_{w}{{\mu }_{g}}}\] \[\Rightarrow \sin \theta \ge \frac{{{\mu }_{w}}}{{{\mu }_{g}}}\]\[\Rightarrow \sin \theta \ge \frac{8}{9}\]You need to login to perform this action.
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