A single linear polariser has an intensity transmittance of 90% for light plane-polarised at the angle of maximum transmittance, and negligible transmittance for the perpendicular polarisation. Two such identical polarisers are set up in series; the first has transmission axis vertical, and the second has transmission axis at 40 degrees from the vertical. Unpolarised light of intensity 20 W m2 is incident on the first polariser. Calculate the intensity transmitted after the second polariser, and specify the transmitted polari- sation state.
A single linear polariser has an intensity transmittance of 90% for light plane-polarised at the angle of maximum transmittance, and negligible transmittance for the perpendicular polarisation. Two such identical polarisers are set up in series; the first has transmission axis vertical, and the second has transmission axis at 40 degrees from the vertical. Unpolarised light of intensity 20 W m2 is incident on the first polariser. Calculate the intensity transmitted after the second polariser, and specify the transmitted polari- sation state.
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A single linear polariser has an intensity transmittance of 90% for light plane-polarised at the
angle of maximum transmittance, and negligible transmittance for the perpendicular polarisation.
Two such identical polarisers are set up in series; the first has transmission axis vertical, and
the second has transmission axis at 40 degrees from the vertical. Unpolarised light of intensity
20 W m -2 is incident on the first polariser.
Calculate the intensity transmitted after the second polariser, and specify the transmitted polari-
sation state.
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