Giới thiệu
You are sitting in a room, looking at a tree through a window. Thetree appears vivid, immediate, real. You have always assumed that thisappearance is some version of what is actually there - filtered, perhaps,or distorted, but fundamentally a representation of the physical worldoutside the glass.This book argues that assumption is wrong.The colour red does not exist, attenuated, in electromagnetic radiationat 700 nanometers. It does not exist there at all.