Unpolarized light is incident on a system of 4 polarizers, Ask an Expert

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Unpolarized light is incident on a system of 4 polarizers. Where the preferential direction of the second is 20 degrees with respect to the first, of the third is 40 degrees with respect to the second, and the fourth is 30 degrees with respect to the third.

What is the intensity of the transmitted light?

What would be the intensity of the transmitted light if the 2nd and 3rd polarizers are removed?

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