A) \[(4/3)\sin i\]
B) \[\frac{1}{\sin i}\]
C) \[4/3\]
D) \[1\]
Correct Answer: B
Solution :
\[g{{\mu }_{w}}=\frac{\sin i}{\sin r}\] \[g{{\mu }_{a}}=\frac{\sin r}{\sin 90{}^\circ }\] \[\Rightarrow \] \[g{{\mu }_{w}}{{\times }_{w}}{{\mu }_{a}}=\frac{\sin i}{\sin r}\times \frac{\sin r}{\sin 90{}^\circ }=\sin i\] Or \[\frac{{{\mu }_{w}}}{{{\mu }_{g}}}\times \frac{{{\mu }_{a}}}{{{\mu }_{w}}}=\sin i\] \[\Rightarrow \] \[{{\mu }_{g}}=\frac{1}{\sin i}\]
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