Two polarizers are oriented at 58.0° to one another. Light polarized at a 29.0° angle to each
polarizer passes through both. What reduction in intensity takes place?
If instead the orientation of the polarizers is 40°to one another and that only 15% of the light gets through both of them, what was the initial polarization direction of the incident light?
Initialy The light polarizez at 29^{\circ} from first poloroid. Let I_o be the unpolorized intensity of light.
Intensity of light after passing first poloroid
Now the intensity of light after passing through second polarizers
Reduction in intensity of light= %
Hence The intensity of light is reduced by 41.5%
If the orientation of the polarizers is 40°to one another and that only 15% of the light gets through both of them,
let the initial angle made by incident light be
Then, After passing through second polarizer
Intensity of light passing from first polarizer
From eqs.(1) and (2)-
Hence the initial incidence angle is
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