A) 15%
B) 25%
C) 50%
D) 60%
Correct Answer: B
Solution :
As, \[{{I}_{1}}=\frac{{{I}_{0}}}{2},\] (Because two polaroids are crossed to each other) and \[{{I}_{2}}={{I}_{1}}{{\cos }^{2}}\phi \] \[=\frac{{{I}_{0}}}{2}\times {{\cos }^{2}}\,{{45}^{o}}\] \[={{I}_{2}}=\frac{{{I}_{0}}}{2}=0.25{{I}_{0}}=25%\]You need to login to perform this action.
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