Unpolarized light passes through two polaroid sheets. The axis of the first is vertical, and that of the second is at 26.0° to the vertical. What fraction of the initial light is transmitted?
^ denotes power
Let the intensity of unpolarized light be I
Then the intensity of light beyond the first polaroid sheet will be I / 2.
If we denote this intensity by I1 then I1= I /2
(This is because in the incident unpolarized light the amplitude of the electric vectors parallel to the the axis of the first polaroid ...
The solution calculates the fraction of light that is transmitted.