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 polarised light with mutually perpendicular plane of polarisation are seen through a polaroid. From the position when the beam A has maximum intensity (and beam B has zero intensity) a rotation of polaroid through 30^(@) 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))=.....

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 intensity), a rotation of polaroid through 30^(@) 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:

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 and has maximum intensity (and beam B has zero intensity). A rotation of polaroid through 60^(underset(-)(o)) 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.