What is UVA and UVB?
Type:Uv phototherapy Time:2016-01-14 10:25:58The sun gives off energy in the form of radiation. Although we can see
sunlight, we can't see or feel the sun's UV rays. Ultraviolet radiation
(UVR) is made of UVA and UVB wavelengths or rays.
Avoid tanning salons and sunlamps. A burn and/or tan is evidence of sun
damageUVB rays are short, powerful and harmful rays that affect the outer layers of the skin. UVB causes sunburn and produces melanin, which gives people a tan. It also damages DNA in the skin, which causes skin cancer.
UVA rays are long rays that penetrate deep into the skin. UVA damages the skin causing wrinkling, sagging and premature aging. It may also have a role in causing skin cancer.