Different types of UV rays reach the ground in different amounts. Sunlight is the main source of UV radiation, even though UV rays make up only a small portion of the sun’s rays. How are people exposed to UV radiation? Sunlight But UVC rays can also come from some man-made sources, such as arc welding torches, mercury lamps, and UV sanitizing bulbs used to kill bacteria and other germs (such as in water, air, food, or on surfaces). Fortunately, because of this, they react with ozone high in our atmosphere and don’t reach the ground, so they are not normally a risk factor for skin cancer.

UVC rays have more energy than the other types of UV rays.

They are also thought to cause most skin cancers. They can damage the DNA in skin cells directly, and are the main rays that cause sunburns.

UVB rays have slightly more energy than UVA rays.

UVA rays are mainly linked to long-term skin damage such as wrinkles, but they are also thought to play a role in some skin cancers. These rays can cause skin cells to age and can cause some indirect damage to cells’ DNA.

UVA rays have the least energy among UV rays.UV radiation is divided into 3 main groups: But even the highest-energy UV rays don’t have enough energy to penetrate deeply into the body, so their main effect is on the skin. Ionizing radiation can damage the DNA (genes) in cells, which in turn may lead to cancer. This means they have enough energy to remove an electron from (ionize) an atom or molecule. Higher-energy UV rays are a form of ionizing radiation. There are also different types of UV rays, based on how much energy they have. They have more energy than visible light, but not as much as x-rays. UV rays are in the middle of this spectrum. There are many types of radiation, ranging from very high-energy (high-frequency) radiation – like x-rays and gamma rays – to very low-energy (low-frequency) radiation – like radio waves. Radiation is the emission (sending out) of energy from any source. Ultraviolet (UV) radiation is a form of electromagnetic radiation that comes from the sun and man-made sources like tanning beds and welding torches.

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