Light is the main medium of visual phenomena. When the eyes are stimulated by light, they can produce vision. When they have vision, they can see the color. If you are in a completely dull chamber, you will definitely not see any color, because without light you will not be able to produce vision. It can be seen that color is light.
According to the form of the light received by the eye, the color represented by the self-illuminating object (for example, fireworks, sun, light tube, television screen) is called the 光源色.
(The eye receives direct light from the light source)
When light hits the surface of an opaque object (for example, wood, bananas, bricks), some of the light is absorbed and partially reflected. The color formed by these reflected light is called the 表面色, and most of the objects around the life are like this.
(The eye receives light reflected from the object)
When light hits a transparent object (for example, stained glass or translucent plastic), some of the light is absorbed or reflected, and the rest is penetrated (refracted). The color thus presented is called the 透過色.
(The eye receives light that passes through the object)
The object itself has no fixed color, and the color that the object presents will change with the light source conditions. That is to say, when the same object is illuminated with different colored lights, the color it presents will change. As shown in the figure below, the left side is the scene of white light illumination, and then the results of red, green and blue illumination respectively, the color presentation has obvious differences. Therefore, if you care about color when shopping, try to illuminate the items with different colored lights (usually white light is more objective).
White light is not a simple color light. It is a composite light composed of many colored lights, so objects illuminated by white light can reflect various colored lights (presenting various colors). As shown below, the green surface only reflects green light (all other colors are absorbed), the white surface reflects all color light, and the black surface absorbs all color light.
