Question

unpolarized light passes through two polarizing filters, oriented at 30° with respect to each other. by what fraction is the intensity of the outgoing light decreased compared to the initial one?

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Answer 1

Answer: 1/4 fraction is decreased

Explanation:

According to Malus's law,

When unpolarized light is passed through two polarizers, oriented at 30° with respect to each other, then the intensity of the outgoing light becomes,

$I = I_0 cos^2 \theta = I_0 cos^2 30^{0} = I_0 \times \frac{3}{4}$

So the fraction of the intensity of the outgoing light decreased compared to the initial one is ,    $\frac{I_0-I}{I_0} = 1/4$

So the answer is 1/4/.