1.

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 .......

Answer»

0.19
0.92
0.5
0.29

Solution :`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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