Sommario
Cosa significa UVC?
La luce ultravioletta è una radiazione elettromagnetica con lunghezze d’onda inferiori a quelle della luce. L’UV può essere diviso in varie categorie, la categoria corta (UVC) è considerata “UV germicida”. A certe lunghezze d’onda l’UV è dannoso per batteri, virus e altri microorganismi.
Quali sono i raggi UV C?
Raggi UV-C, sono i raggi ultravioletti più pericolosi e possiedono una lunghezza d’onda di 100 – 280 nm. I raggi UV-C sono particolarmente dannosi per la salute poiché possiedono un alto potere cancerogeno. Fortunatamente, vengono trattenuti dalla fascia di ozono e per questo non hanno effetti particolari sulla pelle.
Quali raggi UV producono ozono?
UV-C (onde corte; 280 – 200nm): più efficace per la disinfezione germicida. UV-V (UV sotto vuoto, inferiore a 200 nm): può produrre ozono nell’aria.
What is a UV-C led?
As with visible LEDs, a UV-C LED by its very nature is a constant-current device. As the forward current applied to the diode is changed, the UV-C output of the diode increases or decreases in a proportional manner. In addition, the UV-C output of an LED degrades overtime.
What is the who-standard ultraviolet index?
The WHO -standard ultraviolet index is a widely publicized measurement of total strength of UV wavelengths that cause sunburn on human skin, by weighting UV exposure for action spectrum effects at a given time and location. This standard shows that most sunburn happens due to UV at wavelengths near the boundary of the UV‑A and UV‑B bands.
What are the applications of UV light in biochemistry?
Many substances, such as proteins, have significant light absorption bands in the ultraviolet that are of interest in biochemistry and related fields. UV-capable spectrophotometers are common in such laboratories. Ultraviolet traps called bug zappers are used to eliminate various small flying insects.
What is UV-C radiation and how dangerous is it?
UV‑C is the highest-energy, most-dangerous type of ultraviolet radiation, and causes adverse effects that can variously be mutagenic or carcinogenic. In the past, UV‑A was considered not harmful or less harmful than UV‑B, but today it is known to contribute to skin cancer via indirect DNA damage (free radicals such as reactive oxygen species).
https://www.youtube.com/watch?v=6J19vVSN-wo