Originally Posted by **vyomictor** hiiii... please read the question in attachment...... according to malus law intensity of beam passed is I=I(initial) (cos A)^2 where I(intital) = intensity of beam incident, A = angle between plane of polarized light and axis of polarizor... i am not getting what will be intentisity after passing through polarizor P.....plz help |

It is B.

IP = Io/2

Max IQ = Io/2*cos^2(π/4) = Io/4

Max ΙR = Io/4*cos^2(π/4) = Ιο/8