👉 Polychromia is a chromatic phenomenon in which a color appears as three or more colors, rather than just two. This can occur when light passes through a material with different wavelengths of light and produces an image that resembles the appearance of a single color. For example, if you shine light onto a sheet of paper and it reflects off the edges and corners, but not at the center, this is because the light from each edge or corner has been scattered differently by the surface of the paper
