A beam of unpolarised ligth is made to fall,from air ,on its boundary with another transparent medium of refrective index `mu`.The reflected beam is viewed through a rotating analyser.Show on a graph,the variation of intensity of light trasmitted through the analyser with the angel between the pass axis of the analyser and the direction of the reflected beam.

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?

Light from an ordianry source(say a sodium lamp) is passed through a polaroid sheet P_1 .The transmitted light is then made to pass through a second polaroid sheet P_2 ,which can be rotated so that the angle (theta) betwen the two polaroid sheets varies from 0^@ to 90^@ .Show graphically the variation of he intensity of light transmitted by P_1 and P_2 as a function of the angle theta .Take the incident beam intensity as I_0 . Why does the light from a cleear blue portion of the sky,show a rise and fall on intesnity,when viewed through a polaroid ,which is rotated?

A beam of unpolarised ligth is incident on a glass-air interface. Showing a suitable ray diagram,that light reflected from the interface is totally polarised,when mu=tan i_B ,Where mu is the refractive index of glass with respect to air and i_B is the Brewster's angle.

A beam of plane polarised light falls normally on a polariser (cross-sectional area 3 xx 10^(-4) m^2 ),which rotates about the axis of the ray with an angular velcity of 31.4 rads^(-1) .Find the energy of light passing through the polariser per revolution and the intensity of emergent beam,if flux of energy of the incident ray is 10^-3)W .

Consider a light beam incident from air to a glass slab at Brewster's angle as shown in Fig. EP 10.1. A polarised is placed in the path of the emergent ray at point P and rotated about an axis passing through the center and perpendicular to the plane of the polaroid.