Talbot's law is the phenomenon of changes in the colors of objects depending on the viewing angle or lighting. The effect is named after the English scientist William Henry Folds Talbot (1813-1867), who described it in his 1865 book Light and Colors. Talbot proposed that the apparent color of an object depends not only on its own radiation, but also on the reflected colors of light reflected from surrounding objects. He showed that if an object changes its angle relative to the observed person or light source, then the ratio of emitted and reflected colors changes and, consequently, the color of the object becomes different.
This effect is explained by the fact that the optical properties of our eyes are not constant. They depend on the condition of the eye,