Question

The average intensity of light emerging from a polarizing sheet is 0.807 W/m2, and the average intensity of the horizontally polarized light incident on the sheet is 0.972 W/m2. Determine the angle that the transmission axis of the polarizing sheet makes with the horizontal.
Malus's Law
I=Io•(cosφ)^2,
cos φ =sqrt(I/Io),
φ =19.19o

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