1.

Two polaroids are oriented with their principal planes making an angle of 60^(@). The percentage of incident unpolarised light, which passes through the system is

Answer»

1
0.5
0.25
`12.5%`

Solution :Intensity of LIGHT passing through the polariser `I_(1)=(I_(0))/(2)` and intensity of light passing through the analyser `I_(2)=I_(1)cos^(2)(60^(@))`
`impliesI_(2)=(I_(0))/(2)xx((1)/(2))^(2)=(I_(0))/(8)=12.5%` of `I_(0)`.


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