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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)`

A

`1:3`

B

`3:1`

C

`sqrt(3):1`

D

`1: sqrt(3)`

Text Solution

Verified by Experts

The correct Answer is:
A
`(I_(A))/(I_(B)) = (cos theta_(B))/(cos theta_(A))`
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