Solar polarization paradox resolved at last
Physics World
AUGUST 27, 2021
The current polarization puzzle originated in 1996, when astrophysicists Jan Stenflo of ETH Zurich in Switzerland and Christoph Keller (then at the US National Solar Observatory in Arizona) used an instrument called ZIMPOL (Zurich Imaging Polarimeter) to study solar radiation at a wavelength of around 589nm.
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