question_answer

A system of three polarizers \[{{P}_{1}},\,\,{{P}_{2}},\,\,{{P}_{3}}\] is set up such that the pass axis of \[{{P}_{3}}\] is crossed with respect to that of \[{{P}_{1}}\]. The pass axis of \[{{P}_{2}}\] is inclined at \[60{}^\circ \] to the pass axis of \[{{P}_{3}}\]. When a beam of unpolarized light of intensity \[{{I}_{0}}\] is incident on \[{{P}_{1}}\], the intensity of light transmitted by the three polarizers is I. The ratio \[({{I}_{0}}/I)\] equals (nearly):

Answer:

10.67