Unpolarized light with intensity I0 is incident on a series of three polarizers,

Question

Unpolarized light with intensity I0 is incident on a series of three polarizers, as shown in the picture below.

The intensity of the light after the third polarizer is...?

A CONCEPTUAL and numerical anwer is appreciated.

Unpolarized light with intensity I0 is incident on a series of three polarizers, as shown in the picture below. The intensity after the first polarizer is 0.75 I0 0.87 I0 independent of the angle of the first polarizer. The intensity of the light after the third polarizer is 0.05 Io 0.34 Io 0.23 Io

Explanation / Answer

9. unpolarized light goes to 0.5

so independent of angle so c)

10. I = 0.5*cos(5 degrees)^2*cos(47 degrees)^2=0.23

so c)

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