1.

Unpolarised light of intensity 32 watt m^(-2) passes through three polarises such that the transmission axes of the first and second polarises makes an angle 30^(@) with each others the transmission axes of the second and third polarises makes an angle 60^(@) with each other. The intensity of final emerging light will

Answer»

32 watt `m^(-2)`
3 watt `m^(-2)`
8 watt `m^(-2)`
4 watt `m^(-2)`

SOLUTION :`I_(0)` is intensity of unpolarized incident LIGHT
`I=(I_(0))/(2)cos^(2)30^(@)""cos^(2)60^(@)=3` watt `m^(-2)`


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