5. Three polarizing filters are stacked with the polarizing axes of the second a

Question

5. Three polarizing filters are stacked with the polarizing axes of the second and third at 30 and 75.0, respectively, with that of the first. If unpolarized light of intensity I0 is incident on the stack, find the intensity of light emerging from each filter.

Please explain.
5. Three polarizing filters are stacked with the polarizing axes of the second and third at 30 and 75.0, respectively, with that of the first. If unpolarized light of intensity I0 is incident on the stack, find the intensity of light emerging from each filter.

Please explain.

Explanation / Answer

Unpolarized light i0

With three filters -----

First filter i1 = 1/2 i0

second filter i2 = i1 (cos(30))^2

third filter i3 = i2 (cos(75-30))^2

With two filters -----

First filter i1 = 1/2 i0

second filter OMITTED

third filter i3 = i1 (cos(75))^2

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