A single linear polariser made from Polaroid polymer has a power transmittance of 80 percent for light linearly polarised parallel to its peak transmission axis, and 1 percent for light polarised along the orthogonal axis. Calculate the overall power transmittance, for incident unpolarised light, for the cases of: i) Two such identical polarisers with axes crossed at 90 degrees to each other. ii) Three such identical polarisers with axes at 0 degrees, 45 degrees, 90 degrees respectively.
A single linear polariser made from Polaroid polymer has a power transmittance of 80 percent for light linearly polarised parallel to its peak transmission axis, and 1 percent for light polarised along the orthogonal axis. Calculate the overall power transmittance, for incident unpolarised light, for the cases of: i) Two such identical polarisers with axes crossed at 90 degrees to each other. ii) Three such identical polarisers with axes at 0 degrees, 45 degrees, 90 degrees respectively.
Question
Transcribed Image Text:A single linear polariser made from Polaroid polymer has a power transmittance of 80 percent
for light linearly polarised parallel to its peak transmission axis, and 1 percent for light polarised
along the orthogonal axis.
Calculate the overall power transmittance, for incident unpolarised light, for the cases of:
i) Two such identical polarisers with axes crossed at 90 degrees to each other.
ii) Three such identical polarisers with axes at 0 degrees, 45 degrees, 90 degrees respectively.
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