Light Beams through Multiple Polarizers
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In this Demonstration, you can observe the changes in intensity of a light beam as you vary the angles of two or three polarizers.
Contributed by: S. M. Blinder (March 2011)
Open content licensed under CC BY-NC-SA
Snapshot 1: parallel polarizers: full transmission of light beam
Snapshot 2: crossed polarizers: no transmitted light
Snapshot 3: insertion of third polarizer with intermediate orientation: some light gets through now! maximum when θ=45°
"Light Beams through Multiple Polarizers"
Wolfram Demonstrations Project
Published: March 7 2011