Each person noticed that with the onset of darkness, objects having red and blue colors turn black. Of course, objects do not change their color, but why is this happening? In fact, everything is not as mysterious and mysterious as it might seem at first glance.
How does the human eye work?
The visual organs of a person have a rather complex device and are connected directly with the brain. When a person looks at an object, the pupil absorbs the light reflected from it. A stream of rays enters the lens, which is a set of lenses. They are aimed at the object, focused on it. Information from the retina via the optic nerve is sent to the brain, where the image is formed.
Interesting fact: since the brain is directly connected with the eyes and forms a picture, during headaches and other similar problems, a person may feel dizzy, lose the ability to focus on objects.
How does a person see colors?
You need to understand that if a person sees a green object, it is far from the fact that he really is that color. A thing can be absolutely any color, just the brain stains it that way. Then what does the visible color of an object depend on?
The retina consists of color-sensitive rods and cones that receive light from space. They are some signaling devices that respond to the arrival of light inside the eye.The brain reads information from them and gives out a picture painted in a certain color - that is why people see everything in color, not black and white.
The surface of any object has individual reflection properties. Some almost completely reflect the rays of light, scattering them in space at a certain angle, while others, on the contrary, almost completely absorb them.
Moreover, objects reflect rays only in a certain color range. This is how the color of an object is determined. When a person looks at a thing, he sees only the light reflected by it. Based on the rays received inside the retina, the brain forms an image and colors it in color. That is why, if you place the object of their twilight in a well-lit room, it will appear whiter: more light will be reflected from it, which will be noticeable to the human eye, so it will look brighter. However, since some of the rays will nevertheless be absorbed, it will retain its color, which will just look a few tones brighter.
Why do red and blue turn black in the dark?
To answer the main question of the article, you need to pay attention to color dispersion. By dispersion is meant the decomposition of light into individual rays. If you conduct this experiment under ideal conditions and pass light through a prism at a certain angle, it decomposes into rainbow colors in accordance with the children's proverb “every hunter wants to know where the pheasant sits,” where the first letter of the word is the first letter of a certain color.And the closer the color is to the middle, the easier it is to recognize the human eye.
Thus, the brain perceives yellow and green colors more easily, and red and violet - worst of all. You can also notice that blue borders on purple, which means it is also quite difficult for the eye to perceive.
In order for a person to recognize colors difficult to perceive without problems, enough light should fall on them. Therefore, with the onset of darkness, the red and blue colors begin to turn black: the eye simply does not have enough reflected rays from them to accurately determine the color.
Red and blue colors turn black with the onset of darkness, as the amount of light in space decreases. Less than the best is reflected from objects, accordingly, it is harder for the eye to recognize them in space. And since red and blue are almost at the border of color dispersion, the human eye is most difficult to recognize and determine these colors. Thus, when light decreases, it is more difficult for a person to distinguish the color of such objects, and they begin to appear darker or completely black.
