Unpolarized light of intensity I 0 = 550 W/m 2 is incident upon two polarizers.

Question

Unpolarized light of intensity I0 = 550 W/m2 is incident upon two polarizers. The first has its polarizing axis vertical, and the axis of the second is rotated = 45° from the vertical.

Randomized Variables

I0 = 550 W/m2
= 45°

Part (a) What is the intensity of the light after it passes through the first polarizer in W/m2?
I1 = __________________________________________


Part (b) What is the intensity of the light after it passes through the second polarizer in W/m2?
I2 = __________________________________________

Explanation / Answer

I1 = Io/2

I1 = 550/2 = 275 W/m^2

part b )

I2 = I1cos^2theta

I2 = 275 * cos^2(45)

I2 = 137.5 W/m^2

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