Studying the phenomenon of "solar activity," scientists often use terms such as cosmic galactic and cosmic radiation. A significant portion of this radiation is reflected by the ozone layer and glaciers.
This reflected part is negligible compared to what originally comes from the Sun. On Earth, the flow of radiation is uneven.
Ultraviolet (UV) radiation is electromagnetic radiation, so its rays have different wavelengths ranging from 100 to 400 nm.
The shortest rays are called extreme ultraviolet (100-120 nm), abbreviated as EUV / XUV;
Far-ultraviolet - short-wave ultraviolet (120-285 nm) or UVC;
Medium-ultraviolet - medium-wave ultraviolet (285-315 nm) or UVB;
Near-ultraviolet - long-wave ultraviolet (315-400 nm) or UVA.
Bactericidal ultraviolet radiation (UV-C) deactivates the DNA of bacteria, viruses, and other pathogenic microorganisms by destroying their ability to reproduce and cause disease. Specifically, UV radiation damages the nucleic acids of microorganisms by forming covalent bonds between some adjacent DNA bases. The formation of these bonds prevents DNA from uncoiling for replication, and the "organism" cannot reproduce. In fact, when the "organism" attempts to reproduce, it dies.
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