Ultraviolet (UV) radiation is a type of energy produced by the sun and some artificial sources, such as arc welders and solariums.
The sun’s UV is the main cause of skin cancer. Too much UV exposure also causes sunburn, tanning, premature aging, and eye damage.
You can see the sun’s light. You can feel the sun’s heat. But you can’t see or feel the sun’s UV radiation. UV can reach you directly from the sun. It can also be reflected off different surfaces and scattered by particles in the air.
Your senses cannot detect UV radiation, so you won’t notice it is all around you and you won’t notice any skin damage until it has been done.