Question

What is the intensity of the light when it emerges from the first polarizer?​

Answer 1

Answer:

Here is your answer :

After emerging from the first polarizer the intensity is 16 * 3/4 = 12 W/m2, and is reduced to 12 * 3/4 = 9 W/m2 after going through the second. One final note: to rotate light from one polarization direction to another you reduce the loss of intensity by using more polarizers.

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Answer 2

Explanation:

The light incident on the first polarizer is unpolarized, so the angle is irrelevant – the intensity is reduced by a factor of 2.

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