A polaroid is placed at 45^o to an incoming l | vedclass

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(B) According to Malus's Law,the intensity of polarized light passing through a polaroid is given by $I = I_0 \cos^2 	heta$,where $I_0$ is the intens

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$I_0/2$

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(B) According to Malus's Law,the intensity of polarized light passing through a polaroid is given by $I = I_0 \cos^2 	heta$,where $I_0$ is the intensity of the incident unpolarized light and $	heta$ is the angle between the transmission axis of the polaroid and the plane of polarization.However,for unpolarized light incident on a single polaroid,the intensity of the transmitted light is always $I = I_0 / 2$,regardless of the orientation angle $	heta$ of the polaroid.Substituting the values,we get $I = I_0 / 2$.

$A$ polaroid is placed at $45^o$ to an incoming light of intensity $I_0$. Now the intensity of light passing through the polaroid after polarisation would be

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