Researchers have successfully demonstrated a spectrometer that is orders of magnitude smaller than current technologies and ...

Sunburns are caused by UV light damaging skin cells. Making ultraviolet lights safe for people Traditional UV systems use wavelengths at or around 254 nanometers.

A specific wavelength of ultraviolet (UV) light is not only extremely effective at killing the virus which causes COVID-19, but is also safer for use in public spaces, finds new University of ...

Other wavelengths can break down proteins, destroying the virus itself. Even though people have known about UV light’s disinfection abilities for more than a hundred years, there’s been an explosion ...

A specific wavelength of ultraviolet (UV) light is not only extremely effective at killing the virus which causes COVID-19, but is also safer for use in public spaces, finds new research.

There are four subcategories to UV light based on their wavelengths: UVA, UVB, UVC and vacuum-UV. UVA wavelengths are the longest and fall between 400 to 315 nanometers.

With ultraviolet laser emission now possible in the form of a semiconductor diode, this opens the door for the next generation of laser-based consumer devices. Nature Photonics, 2008.

However, the wavelength of ultraviolet light is very short, rendering it difficult to fabricate a structure suitable for it.

While all of the wavelengths we tested can inactivate SARS-CoV-2 at very low doses, the ones that required the lowest dose were the systems that emit UV light at a wavelength of 222 nanometers.

This means that at wavelengths of UV light below 230 nanometers, people can move around more freely while the air around them is being disinfected in real time. Testing different wavelengths My ...

UV light at most wavelengths can kill COVID–19. andriano_cz/iStock via Getty ImagesScientists have long known that ultraviolet light can kill pathogens on surfaces and in air and water.