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when toggle format what by license comment
Feb 21, 2016 at 21:42 history edited Jan Hudec CC BY-SA 3.0
explain that in other situation, filtering reflections is why polarized glasses are used
Aug 10, 2015 at 13:32 vote accept juni-j
Aug 10, 2015 at 12:32 history answered Jan Hudec CC BY-SA 3.0