As UV radiation damages the skin?

The sun emits harmful ultraviolet radiation, which wrecks havoc on the skin. Only a small percentage in the spectrum of sunlight, but they are very harmful to the skin. UV rays can damage skin cells and the disruption of DNA structure. In fact, the tan is a defense mechanism against skin damage.

The spectrum of UV rays are 3 types - UVA, UVB and UVC.

UVA

These rays have a wavelength of 320-400 nm and are the longest in the UV spectrum. They penetrate deep into the surface of the skin and premature aging of the skin and cause wrinkles, fine lines and age spots. Prolonged and unprotected UVA rays can also be the possibility of developing skin cancer. UVA rays through glass windows and analyze, you can influence, even if you are in your home or car.

UVA rays can be divided into two subtypes? Long UVA (UVA-1) and short UVA (UVA-2). Long UVA range 350 to 400 nm short wavelength, while the UVA range 320 to 350 nm exhibit. It is important to know that your wavelength because some sunscreens promise that the broad spectrum protection only protects against UVA and UVA-1-2

UVB

These rays are covering the central region of the UV spectrum, about 280-320 nm. UVB rays are responsible for sunburn. Most of these rays are absorbed by the layer of the epidermis of the skin before reaching the dermis layer. Therefore plays no role in the advancement of wrinkles and fine lines. However, they support the possibility of skin cancer from UVA rays.

The UVC

UVC rays are the shortest of the spectrum. In the range from about 100 to 280 nm wavelength. It has absorbed the most of all harmful UV rays, but fortunately it is completely by the ozone layer of the atmosphere. Although UVC rays are extremely dangerous, are not affected at all of them are.

Irradiation with UV --

The UV exposure is higher in the early afternoon and evening, especially in the summer and in the lower latitudes. And the sun's rays are more than 11 hours. about 4 hours. Therefore, it is advisable to avoid sun exposure during the day. Moreover, the intensity of UV radiation varies significantly in different seasons and latitudes.

Indirect Sunlight

SO damage is caused not only by direct sunlight, but indirect light. This means that even if you wear a hat, umbrella or stand in the shadows, which are not protected from the harmful rays of the sun. This is due to UV radiation is reflected and refracted through common surfaces, such as clouds, water curtains, glass doors and windows.

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