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Standard XII

Physics

Intensity of Polarised Light

An unpolarize...

Question

An unpolarized beam of intensity $2 a^{2}$ passes through a thin Polaroid. Assuming zero absorption in the Polaroid, the intensity of emergent planes polarized light will be

2 a^{2}

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a^{2}

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\sqrt{2} a

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\frac{a^{2}}{\sqrt{2}}

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Solution

The correct option is B $a^{2}$
initial unpolarized intensity is $2 a^{2}$
the intensity of light transmitted by the first polarizered will be $\frac{I_{u n p o l a r i z e d}}{2} = a^{2}$
option $B$ is correct

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An unpolarized beam of intensity 2a2 passes through a thin Polaroid. Assuming zero absorption in the Polaroid, the intensity of emergent planes polarized light will be

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option $B$ is correct