When a plane polarised light is passed through an analyser and analyser is rotated through `90^(@)`, the intensity of the emerging light

When the polariser and analyser are in the crossed position the intensity of the out coming light is

Plane polarised light is passed through an analyser and the intensity of emerging light is reduced by 75%. Optical vibrations make an angle theta with the axis of analyser. Then theta is

Show that when the unpolarized light passe through polariser then the intensity emerging light is half that of the intensity the incident light.

Unpolarised light passes through a polariser and analyser which are at an angle of 45^(@) with respect to each other. The intensity of polarised light coming fromanalyse is 5W//m^(2) . The intensity of unpolarised light incident on polariset is

A plane polarised light is passed through a polaroid, when the polaroid is given one full rotation about the direction of light, then

Unpolarised light of intensity 32 Wm^(-2) passes through three polarisers such that the transmission axis of the last polariser is crossed with first. If the intensity of the emerging light is 3Wm^(-2) , the angle between the axes of the first two polarisers is