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Plane polarized light incidents on tourm...

Plane polarized light incidents on tourmaline plate. `vecE` vectors make `45^(@)` with optic axis of plate. Then % difference in magnitudes o initial and final intensities of `vecE` vectors is .......

A

0.19

B

0.92

C

0.5

D

0.29

Text Solution

Verified by Experts

The correct Answer is:
C
`I=I_(1)=cos^(2)45^(@)`
`I=I_(0)xx(1)/(2) " " :. I=(I_(0))/(2)`
`:. (I_(0)-I)/(I_(0))xx100=(I_(0)-(I_(0))/(2))/(I_(0)) xx100%`
`=(1)/(2)xx100=50%`
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