As polaroid examines two adjacent plane polarised beam A and B whose planes of polarisation are mutually perpendicular. In the first position of the analyser, beam B shows zero intensity. From this position a rotation `30^(@)` shows that thebeams have same intensity. The ratio of intensity of the two beam `I_(Z) & I_(B)`

Two beams A and B, of plane polarized light with mutually perpendicular planes of polarization are seen through a polaroid. From the position when the beam a has maximum intensity (and beam B has zero ntensity), a rotation of polaroid through 30^circ makes the two beams appear equally bright. If the initial intensities of the two beams are I_A and I_B respectively, then (I_A)/(I_B) equals:

A plane polarized beam of intensity I is incident on a polariser with the electric vector inclined at 30^(@) to the optical axis of the polariser passes through an analyzer whose optic axis is inclined at 30^(@) to that of polariser. Intensity of light coming out of the analyzer is

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.

A partially plane polarised beam of light is passes thorugh a polaroid. Show graphically the variation of transmitted light with angle of rotation of polaroid.

A and B are two conductors carrying a current i in the same direction x and y are two electron beams moving in the same direction. Then

An upolarised beam of intensity 2a^(2) passes through a thin polarioid. Assuming zero absorption in the polariod, the intensity of emergent plane polarised light 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