Fill in the blanks

Question

The intensity of a beam of nature light is Iο, when it pass through a polarizer, then the intensity of the transmitted wave I is ____________.

Answer 1

Generally, the intensity is reduced, since the light emerges linearly polarized on the other side of the polarizer.  Only the part of the light whose electric field vector is aligned with the polarizer can pass through the polarizer.  However, if the incident light is plane polarized and its electric field vector is aligned with the polarizer, the intensity should not change. However, natural night is usually unpolarized.