In the previous article, we discussed “What are vintage sunglasses?”. In this article, let’s talk about “If black color absorbs more heat, then why do we use black sunglasses to protect our eyes from the sun?”.
Black can absorb heat.
The light emitted by the light source is an electromagnetic wave, including infrared rays, visible light, ultraviolet rays, and some other rays. Visible light is the red, orange, yellow, green, blue, indigo, violet that we usually see. In addition, on the other side of the red light, there is an infrared ray, which is invisible and has a thermal effect. On the other side of the purple light, there is ultraviolet light, which has a bactericidal effect. The reason that we see colors is that it reflects that visible light, whereas black doesn't reflect anything. It's all absorbed, including infrared light, so it gets the most energy, and it feels hotter. If you're indoors, it's cooler to wear dark colors of the same texture and style. The reason is that, although dark clothing absorbs heat faster, releases heat faster. When we are indoors where the sun does not shine, the heat from our bodies will dissipate through our clothes, and dark clothes will dissipate faster than light clothes.
Black clothes are cooler than white clothes.
Black clothing absorbs more heat than white clothing, but the heat it absorbs can create a convection force inside the clothing to take away sweat and part of the heat on the surface of the skin. The body will naturally feel cool, of course, you should select a few loose black clothes so that the convection can be strengthened, the cool degree of clothes can also be increased. In addition, Wear black clothes indoors or on cloudy days. The sunshine of this time is little, black clothes won't play the role of fast heat absorption, but only play the role with fast heat dissipation. The heat of rapid discharge of skin surface let a person feel the body is cool. Naturally, it feels cooler than other colors.
Black sunglasses work the same way.
First of all, because the lenses are filled with silver iodide, when exposed to strong light, silver iodide breaks down, turning the silver dark and black sunglasses. It also makes the lens color of sunglasses different depending on the concentration of silver iodide. We now have grey, brown, etc. (except, of course, plastic). When the light is dim, it recomposes, so the color becomes lighter and allows you to see in low light. Sunglasses come in many colors besides black. The key is that the pair of sunglasses can block UV, that is, we often say UV. Only if the UV can block more than 380, we call a pair of qualified sunglasses.
Black sunglasses are also a fashion trend.
Stars like very big black cool sunglasses, and they can go out on the street, wearing this style without makeup. For stars, sunglasses are really useful. In the hot summer, It naturally has the effect of shading and blocking light，but at the same time, it is also the most distinctive modeling manifesto. It is the best reason for countless stars to be self-confident and to go to the street without makeup. On the other hand, In addition, black sunglasses are a good way to hide eye shape flaws or puffiness.
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