Etienne Malus (1755-1812) publishes the law of Malus which predicts the light intensity transmitted by two polarizing sheets.
Citation:
Editors. "Law of Malus formulated".
The Literary Encyclopedia. First published 01 May 2009
[http://www.litencyc.com/php/stopics.php?rec=true&UID=6236, accessed 20 May 2013.]