This Spoon Trick Makes Your Room Look Bigger! The curved back of the spoon acts like a convex mirror, just like the ones used in shop corners and car side mirrors. Convex mirrors have outward-curving surfaces that reflect incoming light rays in different directions, making them diverge. Your eyes trace those diverging rays back to a point behind the mirror, creating an image that’s smaller, upright, and virtual. #science #physics #facts #learning #mirrors #hacks #spoon | vt.physics