A) \[135{}^\circ \]
B) \[90{}^\circ \]
C) \[120{}^\circ \]
D) \[180{}^\circ \]
Correct Answer: A
Solution :
For\[I=\frac{{{I}_{0}}}{2}\] and \[I={{I}_{0}}{{\cos }^{2}}\theta =\frac{{{I}_{0}}}{2}\] \[\therefore \]\[\theta ={{45}^{o}}\] Therefore the angle through which either polaroids turned is \[135{}^\circ \] \[\left( =180{}^\circ -45{}^\circ \right)\]
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