Polarized light incident on a polaroid. Let ${\mathrm{}}_{}$\(I_{0}\) be the intensity of light transmitted by this polaroid. Now, a very large number (say \(N\)) of polaroids are placed in a row with their axes displaced through a small angle \(\theta\) successively. If the last polaroid is crossed to the first one, the intensity of light transmitted by the last polaroid is about: