Unpolarized light is incident on a series of two Polaroid sheets. The intensity

Question

Unpolarized light is incident on a series of two Polaroid sheets. The intensity of the light emerging from the second sheet is 7.30% of the intensity of the light incident on the first sheet. Find the angle between the transmission axes of the two sheets.
Unpolarized light is incident on a series of two Polaroid sheets. The intensity of the light emerging from the second sheet is 7.30% of the intensity of the light incident on the first sheet. Find the angle between the transmission axes of the two sheets.

Explanation / Answer

Intensity of the unpolarsed light I = I Intensiy of the light after 1 st polaroid sheet I ' = I / 2 = 0.5 I Intensity of the light after 2 nd sheet I " = I ' cos ^ 2 ( theta ) given I " = 7.3 % of I = 0.073 I plug the values we get 0.073 I = 0.5 I * cos ^ 2( theta ) cos^2 ( theta) = 0.146 cos ( theta ) = 0.382 Theta = 67.53 degrees

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