Can our eye distinguish polarised light from unpolarised light?

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

Is light from sodium lamp polarised?

What is linearly polarised light?

What is elliptically polarised light?

Polarised light can be produced by

How can you detect a polarised 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.

Explain Polarisation. Explain the difference between polarised and unpolarised lights.