• # question_answer Two polaroids have their axes at an angle of $60{}^\circ$ in between. If Io is intensity of unpolarised light falling on first Polaroid then that of emerging light from the second Polaroid is- A) $0.125\text{ }{{I}_{0}}$                     B) $0.25\,\,{{I}_{0}}$C) $0.375\text{ }{{I}_{0}}$                     D) $0.50\text{ }{{I}_{0}}$

Intensity of finally emerged light is $=\,\,\frac{{{I}_{0}}}{2}{{\cos }^{2}}60{}^\circ \,\,=\,\,\frac{{{I}_{0}}}{8}$