Is light from sodium lamp polarised?

A ray of light from a sodium lamp undergoes total internal reflection.The critical angle will be smallest,when it travels from

Light from a sodium lamp(S) passes through two Polaroid sheets P_1 and P_2 as shown in the figure. What will be the effect of the intensity of the light transmitted by P_1 and by P_2 on rotating Polaroid P_1 about the direction of propagation of light? justify your answer in both cases.

Yellow light emitted from a sodium lamp has a wavelength of 480 nm. Calculate the wavenumber of this light.

Yellow light emitted from a sodium lamp has a wavelength of 480 nm. Calculate the frequency of this light.

Yellow light emitted from a sodium lamp has a wavelength (lamda) of 580 mm. Calcualte the frequency (v) and wavenumber (vec v) of yellow light.

Can our eye distinguish polarised light from unpolarised light?

The average wavelength of the yellow light emitted form a sodium lamp is 5893 overset @ A .Express it in nanometres.

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?

A ray is incident on the surface of glass plate of refractive index sqrt 3 . What is the value of angle of incidence, if reflected light is completely polarised?