Why is red generally used for red as a red flag?

The most penetrating are red, yellow, and green, but green means safe, and the human eye is not as sensitive to yellow as red.

The wavelength of red is the most common when explained by physics, and the most striking is explained by common sense.

The red color is saturated and vivid, and the visual effect is noticeable and easy to notice.

Red, orange, yellow, green, blue, and purple, the red light wave is the longest, so the visual effect on people is the most dazzling, and the car lights are yellow, which is the application of yellow dazzling.

The red wavelength is the longest, and it is also the most alarming to look at.

Red is more vibrant, and bright things are generally dangerous.

Because red has a strong impact on people's vision.

The red color is eye-catching, and the human eye is more sensitive to red.

Red is much more conspicuous than other colors.

1. Red is the longest wavelength in red, orange, yellow, green, blue, blue and purple light, which can penetrate raindrops, dust and fog droplets, and can be seen in a long distance.

2. The wavelength of red light is the longest, with microns, and it can easily pass through small particles such as small raindrops, dust, fog droplets, etc., and is not easy to be scattered. As a result, pedestrians and vehicles can still see traffic lights, tail lights, and turn signals in the Lutan section even in rainy, foggy, and dusty days, thus avoiding many traffic accidents.

Why are red flags indicated by red light? The answer to this question relates to the cultural significance of the color red and the nature of the human visual system.

Red is seen as a warning color in many cultures.

First of all, in China, red is often used as a color of blessing and festivity, as well as cessation and vigilance. In Western culture, red is widely regarded as a warning color and is often used in dangerous situations. Therefore, the use of red as a red flag color is considered a common cultural practice.

The human visual system has a special sensitivity to the color red.

Secondly. Red is the color with the longest wavelength in the spectrum, so it is brighter than other colors in low-light environments and is more easily visible to the human eye. In addition, there are two types of cone cells in the human retina, one of which is more sensitive to red light.

This means that we are able to perceive red more clearly and associate it with red flags.

Therefore, for both cultural and physiological reasons, red is the ideal color for red flags. In modern society, we can see the use of red as a danger signal in various occasions, such as traffic lights, fire alarms, medical equipment, and many more. By using the universal red sign, we can communicate red flags to people more effectively and help them protect themselves from danger.

It is generally used for alarm functions, that is, abnormal situation warning lights and so on.

Because red light has the longest wavelength of visible light, it travels the farthest. And there is penetration.

The color of the red light is more vivid, and when you are in danger, you can call for help in time.

Red light has the strongest penetrating power, and it can be clearly seen by people on foggy and cloudy days.

Because red is more vivid than other colors, it will attract more attention, so red is generally used.

Because red light is not easy to be scattered, it has strong penetrating power and is conducive to being seen.

In foggy weather, the sun is red. Looking at the light through the frosted glass, the light is also very red.

It is precisely because red light is not easy to be scattered and has a strong ability to penetrate

The red color is very bright and easy to spot.

We know that when danger can occur, we must protect ourselves first.

The red color is more vivid and looks more obvious, which can be spotted at a glance.

Because red is a symbol of warning, and the color is also bright, it is generally represented by red.

Because human blood is red, red is generally used to indicate red flags.

I think red is a warning color in the human brain, so red is generally used.

Because red light has the longest length of light in the air, it is the easiest to spot.

Red is a sign of vigilance, the public knows it, and red is very conspicuous.

Because the red color is more eye-catching, and it is easy to lift the spirit with a sense of awakening.

Because red is a more conspicuous color, it can serve as a warning.

This is mainly because it is more eye-catching, so this color is used.

Because this thing is a habit that people have been using for a long time.