An unpolarised beam of light of intensity `I_0` is incident on a combination of two polaroids.Find the net intesity of light of intensity transmitted by the combinatin,when the pass axis of the two polaroids are inclined to each other at an angle of `60^@`.

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

If a polaroid is kept in the path of a uniformly unpolarised light ,the intensity of the transmitted light to the intensity of the light ,when the polaroid is not kept in its path,is

There aree n identical sources and each of them is emitting light of intensity I_0 .Find the resultant intensity of light on interference,when the sources of light are incoherent.

A polariser and analyser are so oriented that intensity of light transmitted is maximum. What fraction of maximum light is transmitted when analyser is rotated through an angle of 60^@ ?

Two polaroids P_1 adn P_2 are placed with their pass xes perpendicular to each other.An unpolarised ligth of intensity I_0 is incident on P_1 .a thid polaroid P_3 is kept in betwen P_1 and P_2 such that its axis makes an angle of 60^@ with that of P_1 .determine the intensity of light transited through P_1,P_2 and P_3 .

Two polaroids are placed at 90^@ to each and the transmitted intensity is zero. What happens when one of them is rotated?

Two glass pates P and Q are held close and parallel to each other.A narrow beam of onochromatic light AB of intensity I is incident on plnate P ,which is partially reflected and transmitted by it. The transmitted beam DE is reflected by plate Q,which is subsequently again reflected and transmitted by the plate P as shown in Fig.6.14. If durign a reflection,each glass plate reflects one-fourth of the light incident on it,then find the intesnstities of maxima and minima in the interference pattern produced by the two beams BC and IJ.

Three polaroids are placed insuch a manner that the third polaroid is crossed with the first.When a beam of unpolarised light of intenstiy 24 W m^(-2) falls on the first polaroid,the intensity of light reduces to 3W m^(-2) on emerging fromo the thrid polariod.Find the angle between the trnasmission axes of the second and third polaroid.

Two polaroids P_1 and P_2 are placed with their pass axees perpendiculat to each otehr.An unpolarised ligth of intensity I_0 is incident on P_1 .A third polaroid P_3 is kept in between P_1 and P_2 such that its pass axis makes an angle of 45^@ with tha tof P_1 .Dtermine the intensity of light transmitted through P_1,P_2 and P_3 .

Two polaroids P_1 and P_2 are placed with their pass axes perpendicular to each other.An unpolarised ligth of intensity I_0 is incident on P_1 .A third polaroid P_3 is kept in between P_1 and P_2 such that its pass axis makes an angle of 30^@ with that of P_1 .Determine the intensity of light tranjsmitted throug P_1,P_2 and P_3 .