What is unpolarised light?

What is an unpolarised ligth ?Explain with the help of a suitable ray diagram,how an unpolarised light can be polarised by reflection from a transparent medium.Write the expression for Brewster angle in terms of the refractive index of the denser medium.

Can our eye distinguish polarised light from unpolarised light?

Figure EP 10.19 shows a two slit arrangement with a source which emits unpolarised light. P is a polariser with axis whose direction is not given. If I_0 is the intenstiy of the principal maxima when no polariser is present, calculate in the present case, the intensity of the principal maxima as well as of the first minima.

Which special characteristic of ligth is demonstrated only by the phenomenon of polarisation?Distinguihs clearly between linearly polarised light and unpolarised light.

When an unpolarised light intensity I_0 is incident on a polarising sheet ,the intensity of the light which does not get transmitted is

The refractive index of a material is sqrt3 . What is the angle of refraction if the unpolarised light is incident on it at the polarising angle of the medium.

Differentiate betwen polarised an unpolarised light .How are these represented?

A beam of unpolarised light is incident on the boundary between two transparent media.If the reflected light is completely plane polarised,how is its direction related to the direction of the corresponding refracted light?

Two polarised are placed at 90^@ to each other and the intensity of transmitted light is zero. What will be the intensity of transmitted light, when one or more polaroids is placed between these two bisecting the angle between them? Take intensity of unpolarised light as I_0 ?