Why are ultraviolet rays stronger on cloudy days

The weather in nature is changeable. It can be sunny or cloudy. The weather is cooler on cloudy days, but there is no sun. Ultraviolet rays are a type of light in nature. They have radiation effects. In addition to sterilization, they also have certain hazards, such as suntanning. Cloudy days are related to ultraviolet rays. Ultraviolet rays will be stronger on cloudy days. So why are ultraviolet rays stronger on cloudy days?

Ultraviolet rays are sometimes particularly strong in cloudy or rainy weather, because clouds mainly reflect visible light, while ultraviolet rays are not reflected, so ultraviolet rays will not be weakened much when it is cloudy or rainy.

As the hot summer approaches, more and more people are aware of the damage that ultraviolet rays can do to the skin. However, ultraviolet rays from the sun are present every day, but the strength varies. You can be exposed to ultraviolet rays on cloudy days, sunny days, summer, winter, outdoors, and even indoors. It is a new concept of sun protection and skin care that is worth promoting to take corresponding simple protection and key protection according to the strength of ultraviolet rays, and use high-quality sunscreen products suitable for daily use.

Ultraviolet light is a type of light that cannot be seen by the human eye. It can be divided into three types: long-wavelength ultraviolet light (UVA), medium-wavelength ultraviolet light (UVB) and short-wavelength ultraviolet light (UVC). There are two main sources of ultraviolet rays. One is natural radiation source, which is electromagnetic radiation caused by sunlight. The other is artificial radiation source. Any material heated to a temperature exceeding 2500K will begin to emit. Therefore, at night in places with strong lighting, such as dance halls, the skin will also be damaged by ultraviolet light.

There are two types of ultraviolet rays that can harm human skin: UVA and UVB. Among them, UVB with a shorter wavelength will cause shallow damage, only reaching the epidermis of the skin, causing sunburn and sunburn; if there is no continued exposure to UVB radiation, the damaged surface skin will fall off as the skin grows in a 4-week cycle, and the skin can gradually return to its whiteness. The damage of UVA can penetrate into the dermis of the skin, causing not only tanning and sunburn, but also premature aging of the skin, and the effects are difficult to recover.