Red is the hue at the very end of the visible light spectrum, close to orange and opposite violet. It has a prominent wavelength in the range of 625-740 nanometres. Red pigment stones such as carminic acid and coprinus are used to make paint and varnish.
Light red is a color in the red-orange region of the spectrum, between yellow and white. Dark red is a color in the purple-black region of the spectrum, near black. These colors result from the mixture of red and blue components.
The word "red" comes from the name of the color produced by mixing equal parts of red and blue paints. The original term was "rosy pink," which came from the French word for rosé wine, "rosé." This shows that people have been painting in red for quite some time.
In English, red means passionate, intense, eager, ready, strong, swift, etc. ; also means harmful or poisonous. In Spanish, it means same as in English.
In German, it means serious, important; also reddichte, meaning liberal toward others who are less fortunate than one oneself. Liberalism is another word for liberalism involves giving freedom and equality to others who might not be given these things themselves.
Because red is the least dispersed by air molecules, it may be seen farther than other hues that are more scattered. Because red has the longest wavelength and can penetrate things the farthest, it can be seen the farthest of any visible wavelength.
Red dominates the color spectrum because substances that reflect light in the visible spectrum also tend to reflect it as red. Because red is not confused with green or blue, it allows for accurate color discrimination between objects that might otherwise be hard to separate.
The word "red" is used here to describe the pigment that makes up most of what you see when you look at a tomato, apple, or cranberry fruit. This pigment is called anthocyanin and it contains chemical compounds called polyphenols. When exposed to light, these chemicals react with oxygen molecules in the atmosphere to form larger molecules that scatter light of all colors but especially red. Thus, red fruits such as tomatoes and cranberries have evolved to contain more anthocyanins to make them more visible against their background.
Fruit colors other than red include yellow, orange, and purple. The pigments that produce these colors are different from each other and do not contain anthocyanins. Instead, they are carotenoids (orange), flavonoids (yellow/gold), or phenolics (purple).
700 nanometers or less Visible Light Wavelengths Because each hue is a different wavelength, when the whole spectrum of visible light passes through a prism, the wavelengths divide into the colors of the rainbow. Violet has the shortest wavelength, around 380 nanometers, while red has the greatest wavelength, approximately 700 nanometers. All colors in between exist, too.
The wavelength of red light is greater than 600 nm. Therefore, it is able to be absorbed by oxygen (gas form). When this happens, oxygen molecules are broken down and converted into more reactive species that can cause damage to living cells. Such damage can lead to skin cancer if enough time passes after the exposure. The length of time that the light needs to reach the blood stream to be effective goes up as the wavelength gets longer. Red light with a wavelength of 632.8 nm has been shown to penetrate human skin.
The maximum penetration depth for red light into tissue is about 2 mm, which means it can be used to treat disease processes at that level and below. However, for efficient treatment of diseases such as cancer it may be necessary to use light with higher intensity. Higher intensity lights can reach deeper into tissue because they carry more energy per unit area. Thus, they can break down/convert chemicals at greater depths within the body.
Cancer patients who suffer from pain often turn to opioid drugs like morphine to relieve their suffering.
Visible Light Wavelengths Because each hue is a different wavelength, when the whole spectrum of visible light passes through a prism, the wavelengths divide into the colors of the rainbow. Between violet and red are blue (about 450 nm), green (520 nm), orange (560 nm), and yellow (590 nm).
In terms of frequency, color lights can be divided into three groups: violet (low frequency), blue (medium frequency), and white (high frequency) or gray (if you add more colored lights together they make white or gray). Color temperature is a measure of how much heat is given off by a color source like an incandescent lamp or sunlight. Cooler colors such as green or purple give off less heat than warmer colors such as red or orange.
The wavelength of red light is greater than that of violet light because red contains more energy per photon. Photons are the particles that make up light; they can only transmit force not information. When photons hit molecules in our eyes they trigger chemical reactions that produce nerve signals leading to vision. As we know, the longer the wavelength, the higher the frequency of the light wave. High frequency waves contain more energy than low frequency waves, so red light is more powerful than violet light.
First and foremost, we must state that the color "red" was not picked for a single purpose. Red, it turns out, has a number of qualities that make it great for signs and stop signals. The wavelength of red is around 640 to 720nm. This is close to the wavelength of light emitted by an incandescent bulb or fluorescent tube. So, you can see why these devices use colors that are near red, like orange, yellow, or green to be more visible at night.
The word "stop" in stop sign comes from the fact that these signs used to be made out of wood. A stop signal is any signal that causes your vehicle to come to a complete stop. These signs used to be made out of wood so that drivers would have something to click when they wanted their vehicles to completely stop.
Another reason red is popular with stop-sign makers is that it is one of the only colors that doesn't need any additional markers after it is chosen as the main color on its own. If you want to add other colors too, they can be used as markers (to indicate different types of signs or lanes), but if red works well as the main color, then there's no need to include others.
Finally, red is the most effective color for stopping traffic because it is highly visible in the dark.
Wavelengths and colors
|Red||638 nm, 650 nm, 670 nm|
|Yellow||589 nm, 593 nm|
|Green||532 nm, 515/520 nm|
Red is the most energy-diminishing color, whereas violet is the most energizing. The color of a solid object is determined by the light it reflects. It will be blue if it absorbs light in the red and yellow portions of the spectrum. If it absorbs only green light, it will be green. If it absorbs all colors but red, it will be black.
When you see red, your brain automatically filters out much of the other colors in the environment. This allows you to focus on the blood being pumped through the arteries and veins, which is why images are often depicted in red or pink. It also helps doctors find problems inside the body with simple blood tests.
The more energetic the color, the better for your health. Violet is the most energetic color, followed by orange, then blue, and finally red, which is the least energetic color. A person's aura appears different depending on what part of the spectrum they absorb. If they absorb only red light, for example, they will appear dead. If they absorb almost all wavelengths of visible light, they will appear white or invisible.
A healthy person's aura is usually shown in a variety of colors. An unhealthy person's aura may be mostly red, indicating that there is an excess of blood in the body, or it may be completely black, showing that there is something wrong with the heart.