Two polaroid sheets are inserted between two other polaroid sheets which have th

Question

Two polaroid sheets are inserted between two other polaroid sheets which have their transmission directions crossed, so that the angle between each successive pair of sheets is 30 degrees. Find the transmitted intensity if the original light is unpolarized with intensity I=40.0 W/m^2
Two polaroid sheets are inserted between two other polaroid sheets which have their transmission directions crossed, so that the angle between each successive pair of sheets is 30 degrees. Find the transmitted intensity if the original light is unpolarized with intensity I=40.0 W/m^2

Explanation / Answer

here,
Intensity of unpolarised light, Io = 40 W/m^2
Angle , A = 30 degrees

From malu's Law,
Intensity , I = Io*Cos^2A
I = 40 * Cos^2(30)
I = 30 W/m^2

The intensity of transmitted light, I = 30 W/m^2

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