Because dark colors absorb more light energy, they absorb a lot more heat than brighter hues. In fact, the closer a hue gets to dark, the more heat it absorbs from light sources. The crucial point is that colors do not absorb various quantities of heat, just light heat. A red hot iron rod will be much hotter than an orange one, even though both are "hot".
The color of an object determines how much heat it absorbs. For example, if you were to cover a white sheet with red paint, it would be very hot after being exposed to the sun for an hour. This is because most of the light hitting the paint would be reflected back out into space. Only a small part of it would be absorbed by the paint, which is why it takes longer for the paint to cool down.
If the same piece of canvas was painted black, most of the light would pass through it without being reflected and so it would get hot much faster. It would also be cooler later because less heat would be absorbed. There is another factor at work here: black has no color of its own. So when it's used to paint objects they appear black because they're absorbing all the visible light being reflected off them.
For example, if you were to walk into a room and turn off all the lights, your eyes would adjust quickly and you would see in almost complete darkness.
This provides a solution to the issue, "Why does black absorb more heat than other colors?" Because black absorbs all light and reflects very little, it converts more heat. The deeper a hue, the more heat it absorbs, and the lighter the color, the less heat it absorbs. Cool black is dark blue-black or navy-black, while hot black is a bright red-black.
Black absorbs both visible and infrared light. Visible light is light that can be seen by the human eye, while infrared light is light that cannot be seen but can still pass through objects and into other materials. Black objects will absorb some of this IR radiation and give off some of their own IR radiation in return.
Because black absorbs heat, it can be used as a method of keeping your house cooler during summer months. By covering up any window openings with black cloth, you are preventing much of the heat from entering your home, which can help reduce the temperature inside significantly.
The color black also has uses outside of the home. For example, when you want to hide something completely or make it harder to find, using black is a good choice. Also, because black looks cool, it is often used on sports equipment and clothing to make them appear bigger or have more style.
Finally, black can be useful when trying to start a fire.
Light is absorbed more effectively by darker hues. Because light is energy, absorption would raise the temperature of a substance. As a result, darker hues become greater heat radiators. It is critical to understand that an item appears white if it reflects all colors and black if it absorbs all hues. Thus, although black is considered a dark color, it does not absorb all light so it does not cool off items that are painted black.
The human eye is most sensitive to green light, which accounts for why plants are usually green. The word "green" comes from the name of this color; it means "fresh from the earth." Red light is least visible because it has high frequency vibrations that our eyes cannot detect. Orange light is slightly less invisible than red but still visible. Invisible light is only absorbed by certain chemicals found in paints and dyes. These compounds change their structure when exposed to light, causing them to fluoresce or glow after being illuminated.
When light hits objects that are colored, some wavelengths are reflected back toward the source while others are absorbed. The amount of absorption varies depending on the color. For example, blue light is mostly absorbed by purple fabrics because they contain molecules called anthocyanins. Green light is mainly reflected off plant leaves because they're full of molecules called chlorophylls.
Dark hues absorb more heat generated by sunlight than lighter ones reflect. That's why wearing a black shirt on a hot day feels so much hotter than wearing a white shirt! The color black also absorbs sound better than other colors, which is why microphones and headphones designed for audio recording tend to be black.
The color red has the highest temperature rating of any human-made material except silver. If exposed to direct sunlight, its surface will quickly get too hot to touch. However, because red does not reflect light, it does not cool off sunlight as white or gray does. Light colored clothes are best if you are going to be outside for an extended period of time during the summer months.
Blue and purple have a higher temperature rating than red because they are less visible against a background of green plants or the sky. This means that if you are wearing blue or purple clothing and come into contact with something hot, such as a grill or a car engine block, you have a greater chance of getting hurt.
White objects reflect light and thus heat back out from the sun's rays more than dark objects do. Therefore, if you are wearing white clothing and go outside on a sunny day, you won't feel as warm as someone dressed in black.