Physics · 2018
JEE Main · 16 April 2018, Shift 1 · Q23
Unpolarized light of intensity I is incident on a system of two polarizers, A followed by B. The intensity of emergent light is I/2. If a third…
Unpolarized light of intensity I is incident on a system of two polarizers, A followed by B. The intensity of emergent light is I/2. If a third polarizer C is placed between A and B, the intensity of emergent light is reduced to I/3. The angle between the polarizers A and C is $\displaystyle \theta$. Then :
Official answer
(2)
$\displaystyle \cos \theta=\left(\frac{2}{3}\right)^{1 / 4}$
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JEE Main 2018 Physics question, with the answer from NTA’s final answer key. Where our answers come from.