english: Because if the tile in that shadow were in fact in shadow, and reflecting the same amount of light to your eye as the one outside the shadow, it would have to be more reflective -- just the laws of physics.
non_english: zapravo u senci, i reflektuje istu količinu svetlosti vašem oku kao i ona van senke, morala bi imati veću refleksiju -- to su samo zakoni fizike.