Question 171: Waves Optics

Question

A beam of unpolarised light of intensity $${{\rm I}_0}$$ is passed through a polaroid $$A$$ and then through another polaroid $$B$$ which is oriented so that its principal plane makes an angle of $${45^ \circ }$$ relative to that of $$A$$. The intensity of the emergent light is

Accepted Answer

Relation between intensities
$${{m I}_r} = \left( {{{{{m I}_0}} \over 2}} ight){\cos ^2}\left( {{{45}^ \circ }} ight) = {{{{m I}_0}} \over 2} 	imes {1 \over 2} = {{{{m I}_0}} \over 4}$$

Answer

$${{\rm I}_0}$$

Answer

$${{{I_0}} \over 2}$$

Answer

$${{{I_0}} \over 4}$$

Answer

$${{{I_0}} \over 8}$$

Waves Optics

A beam of unpolarised light of intensity ${{\rm I}_0} is passed through a polaroid A and then through another polaroid B which is oriented so that its principal plane makes an angle of {45^ \circ } relative to that of A$. The intensity of the emergent light is

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