Scientific demonstration of traffic signal control machine light color

The earliest time as long as the two colors red, green, later improved, increased a yellow light, red light indicated continuous, yellow marked ready, a green light indicates to traffic. Chose these three colors, using these three kinds of colour as traffic signals and person

in the earliest time, only red and green. After the improvement, increase the yellow light. Said a red light, yellow light said, the green said. Choose the three colors as the cause of the traffic signal is also related to the structure and the psychological reaction of people's vision. The human retina contains rods and three kinds of cone photoreceptors, rods of yellow light is particularly active, and three types of cone cells are red, green and blue is most active. Due to this kind of visual structure, people can be the simplest distinguish between red and green. Although brief is the difference between yellow and blue also, but red and green is to distinguish the color of choice, because the eye's less activation blu-ray photoreceptor cells. The traffic light is not optional Settings. According to the principle of optical, red light wavelength long, through air body ability is strong, signal is more obvious than others. So choose green as notification of the ban signal, because of the difference between red and green is the largest, and easy to distinguish, After all, red green color blindness is a small number of) 。 In addition, the color also can express specific meanings. To heat or intensity, the strongest color is red, the second is yellow. Green light light pole base cold and quiet. As a result, people often use a red danger, yellow warning, green said. The above content from guangdong new energy signal light pole manufacturers. Please indicate whether the copy.