A) 100%
B) 50%
C) 30%
D) 12%
Correct Answer: D
Solution :
If I is the final intensity and I0 is the initial intensity then \[I=\frac{{{I}_{0}}}{2}{{({{\cos }^{2}}30{}^\circ )}^{5}}\] or \[\frac{I}{{{I}_{0}}}=\frac{1}{2}\times {{\left( \frac{\sqrt{3}}{2} \right)}^{10}}=0.12\]
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