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.

What is linearly polarised light? Describe briefly using a diagram how sunlight is polarised.

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

Show, giving a suitable diagram, how unpolarised light can be polarised by reflection.

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

Why does unpolarised light from a source show no variation in intensity when viewed through a polariod which is rotated? Show with the help of a diagram, how unpolarised light from sun gets linearly polarised by scattering.

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?

The light from a clear blue portion of the sky shows a rise and fall of intensity when viewed through a polaroid which is rotated. Describe, with the help of a suitable diagram, the basic phenomenom/process which occurs to explain this observation.

How does the amount of reflected light depend on the nature of the medium ?

A polaroid is inclined at an angle 45^(@) with the incident light of intensity I_(0) . After polarisation, intensity of the light emitted from the polaroid is