Two 'crossed' polaroids A and B are placed in the path of a light-beam. In between these, a third polaroid is C is placed whose polarisation axis makes an angel `theta` with a polarisation axis of the polaroid A. If the intensity of light emerging from the poloaroid a is `I_(o)` then show that the intensity of light emerging from polaroid B will be `1/4I_(o) sin^(2)theta.`

Two crossed polaroids are placed in the path of a light beam. In between these a third polaroid is placed whose polarisation axis makes an angle phi with the polarisation axis of the first polaroid Then, intensity of light emerging from the third polaroid, in term of phi is

The polaroids are placed in the path of unpolarized beam of intensity I_(0) such that no light is emitted fromthesecond polarid. If a third polaroid whose polarization axis makes an angle theta with the polarization axis of first polaroid, is placed between these4 polariods then the intensity of light emerging from the last polariod will be

Two polaroids are placed in the path of unpolarized beam of intensity I 0 such that the intensity of light emitted from the second polaroid is 9/50 l_(0). If third polaroid whosepolarization axis makes an angle theta with the polarization axis of first polaroid, is placed between these polaroids, such that the intensity of light emerging from the last polaroid is zero, then angle theta is

Two crossed polarod A and B are placed in the path of a beam of unpolarized light . In between these two polaroid, a third polaroid C is placed such that its principal section is at an angle of 60^@ with that of A. What percentage of intensity of incident unpolarized light emerges from C and B ?