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How many types of UV rays are there?

UV rays (from English Ultraviolet), also known as ultraviolet rays or ultraviolet rays, are electromagnetic waves with wavelengths shorter than visible light but longer than X-rays. The ultraviolet spectrum includes the near-ultraviolet range. (with wavelength from 380 to 200 nm) and ultraviolet or vacuum ultraviolet (with wavelength from 200 to 10 nm). When concerned about the harmful effects of ultraviolet rays on human health and the environment, the ultraviolet spectrum is divided into:

UVA group (ultraviolet A wavelength) 95% of the sun's rays are UVA. The harmful effects of ultraviolet A wavelength are causing our skin to wrinkle. Zinc oxide and titanium oxide are very effective in blocking UVA rays.

UVB group (ultraviolet B wavelength) causes sunburn, reduces the ability to produce collagen and elastin in the skin.

UVC group: UVC rays and part of UVB rays cannot reach the earth because they are filtered through the atmosphere. This light can destroy nucleic acids in cells, destroy DNA that exists in living organisms... UVC is the ghostly light that haunts the existence and life of humans on earth. This is the most harmful type of ray.

Which UV rays are harmful to the skin?

UVA rays are considered the "silent killer" because unlike UVB rays, you don't feel their effects, but they actually penetrate deep into the skin, wreaking havoc on every layer of the skin. silently. The harmful effects of UV rays are caused mainly by UVA rays. This is the leading cause of wrinkles and greatly increases the risk of skin cancer.

UVA rays are considered a "silent killer", you will not feel anything, but the harmful effects of UVA ultraviolet rays are still silently destroying your skin. Another difference is that UVA ultraviolet rays have the ability to penetrate glass, causing harmful ultraviolet rays to the skin, while UVB rays do not. Unless the window or car glass is specifically designed to filter UVA rays, using sunscreen is extremely important to protect the skin from the harmful effects of this ultraviolet rays.

Specialized UV sensor detects and measures the concentration of solar UV rays for warning and control.