Question

With two Polaroid filters, specially fabricated plastic sheetshaving the property that they transmit light which is linearlypolarized along a certain direction—called the “polarizationdirection” of the filter—determined by material properties of theplastic sheet. Conversely, Polaroid filters absorb light polarizedat right angles to the polarization direction.
--Look at any lighted scene through both filters, rotating one withrespect to the
other about the line-of-sight. What happens? Why?