What is ultraviolet radation?

Answer 1

UV stands for "ultraviolet" radiation, radiation of a shorter wavelength than visible light. It is the part of sunlight that heats the atmosphere and the surface of Earth. One form of UV radiation causes human skin to tan.

Answer 2

Exposure to ultraviolet (UV) radiation is a major risk factor for most skin cancers. Sunlight is the main source of UV rays. Tanning lamps and beds are also sources of UV rays. People who get a lot of UV exposure from these sources are at greater risk for skin cancer.

Even though UV rays make up only a very small portion of the sun's rays, they are the main cause of the sun's damaging effects on the skin. UV rays damage the DNA of skin cells. Skin cancers start when this damage affects the DNA of genes that control skin cell growth.

Answer 3

UV stands for ultra violet rays - they are the waves which have greater frequency than violet colored rays, in the electromagnetic spectrum; this means that they have greater penetrating power than the visible light band of rays.

Answer 4

Sunlight has long since been known to kill micro-organisms. The rays from the sun contain the UV Spectrum used in Ultraviolet Water Treatment Systems - although at much lower intensities. Ultraviolet (UV) is a safe, clean, easy-to-maintain method of assuring that water is free of bacteria. UV Water Purification uses Ultraviolet light, just like sunlight, to kill micro-organisms that may be in the water.

Answer 5

Ultraviolet rays are light waves that we cannot see with our eyes, very similar to infrared or radio, microwave waves etc.

Answer 6

" UV " is short-hand for "ultraviolet". That means: Electromagnetic radiation
with wavelengths just shorter than the shortest that we can see (violet).

Answer 7

It is radiation given out by the sun that can damage the skin if the skin is exposed to it for a large amount of time without protection.

Answer 8

UV rays are radiations of the sun. They are harmful to humans.