I just got back from the cinema an hour ago and brought my 3d glasses home,i know these glasses work by only allowing light that oscillates in certain dirrections through the lenses,and each lense lies perpendicular to the other,allowing only one set of light through each lense,making you to see a composite image of two different images. now what puzzled me was,when i look in the mirror with one i closed,the lense covering the open eye turns dark,so i can see everything else fine,but my eye and skin surrounding my eye disappears. in the mirror image. what im wondering is,do mirrors polarise lightwaves,is that why i cant see my open eye but can my closed one? could someone give me not only a qualatative explanation,but also inclusde some quantitative information so i get a feel for not only how the process works but how we describe it with mathematics?