Ultraviolet Radiation is a type of light that is
projected by the sun. UV rays are the
sun’s way of giving an output of energy.
They are responsible for sunburns, tanning of the skin, skin cancer, premature
aging of the skin, and eye damage. The most severe UV damage occurs to the skin
and eyes. The atmosphere can play an
important factor in determining how much UV light is received. For example, more UV light is projected at
higher altitudes than lower ones. There
are two important types of UV rays that the sun projects: UVA and UVB.
UVA rays are the most harmful because they are not absorbed by the ozone layer. These are the types of rays that cause the skin to tan. They’re responsible for causing premature aging of the skin, because they penetrate deep into the skin, affecting the layers that give skin its tone and elasticity. The reasoning of its deep penetration has to do with its long wavelength.
Unfortunately, most sunscreens do not protect the skin from the UVA rays. The only known chemical that does offer protection is Mexoryl. According to one doctor in particular, it gives almost “perfect protection against sunshine.” However, the chemical is not yet legal in the
UVB rays are not as harmful as the UVA rays because they are partially absorbed by the ozone layer. These rays are known to cause sunburn. Most UVB rays are captivated by sunscreens. UVB rays destroy cells in the outer layer of the skin. The UVB light damages the