Unpolarised light is incident on a polaroid. How would the intensity of transmitted light change when the polaroid is rotated ?

A narrow beam of unpolarised light of intensity I_(0) is incident on a polaroid P_(1) . The light transmitted by it is then incident on a second polaroid P_(2) with its pass axis making angle 60^(@) relative to the pass axis of P_(1) . Find the intensity of the light transmitted by P_(2) .

When unpolarised light is incident on two crossed polarisers, no light it transmitted. A student asserted that if a third polariser is added transmission of light will occur. Does this make sense? How can adding a third filter increase transmission?

When the intensity of light is low during night the light is detected by

When the intensity of light is low during night the light is detected by

Distinguish between unpolarised light and linearly polarised light. How does one get linearly polarised light with the help of a polaroid?

How does an upolarised light incident on a polaroid get polarised? Describe briefly, with the help of a necessary diagram, the polarisation of ligtht by reflection from a transparent medium.

An unpolarised light is incident at angle of polarisation on a reflector. Determine the angle between the reflected and the transmitted rays.

(i) State Brewster's law. (ii) An unpolarised light is incident at angle of polarisation on a reflector. Determine the angle between the reflected and the transmitted rays.