Que:
Completely un-polarized light of intensity Io is occurrence on a polarizer whose polarization direction makes an angle of 15.0 degrees amid respect to the vertical. What is the intensity of the light which makes it through the polarizer?
Answer:
While randomly-polarized light a.k.a. totally randomly-polarized light, un-polarized light and completely-un-polarized light is normally incident1 upon a polarizer and the reader is to assume that the light is normally incident upon the polarizer unless information to the contrary is provided half the light2 gets through.