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.
da je zaista bila u sjeni i reflektirala istu količinu svjetlosti na tvoje oko kao i ona koja nije u sjeni, morala imati veću refleksiju -- to su jednostavno zakoni fizike.