Unpolarized light whose intensity is 1.90 W/m 2 is incident on the polarizer in

Question

Unpolarized light whose intensity is 1.90 W/m2 is incident on the polarizer in the figure.

(a) What is the intensity of the light leaving the polarizer?
____________W/m2

(b) If the analyzer is set at an angle of ? = 78? with respect to the polarizer, what is the intensity of the light that reaches the photocell?
____________W/m2

Unpolarized light whose intensity is 1.90 W/m2 is incident on the polarizer in the figure. (a) What is the intensity of the light leaving the polarizer? ____________W/m2 (b) If the analyzer is set at an angle of ? = 78° with respect to the polarizer, what is the intensity of the light that reaches the photocell? ____________W/m2

Explanation / Answer

1) lose half at polarizer so 1.9/2 = 0.95 W/m^2

2) I = 0.95*cos(78 degrees)^2=0.041 W/m^2

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