A polarisation filter selects one polarisation direction of the incoming light. By placing two polarisation foils on top of each other one can adjust the amount of transmitted light. This principle is used with some sunglasses! See this live at the 2006/07 Physikshow of the University of Bonn.
http://www.physikshow.uni-bonn.de/
Studiumsgebühren: JA
Langzeitstudierer: NEIN
Passt doch ^^
GeistOdin1987 11 months ago