Ryan Castellucci (they/them) 
@vidister apparently five minutes of arc welding burns the flesh, so it seems legitimately scarier to me
210561 ✨ [Q]@ryanc @vidister can confirm, welding skin burns are significantly easier and nastier than sunburn
speaking from experience
Manawyrm | Sarah@q @ryanc @vidister
It's just australian summer sun, but at home...
Still, it's ionizing radiation!
It will break apart the chemical bonds of organic molecules (like your skin!) in the same way as a radioactive source would (with less energy, but still)!
Random DNA-bitflips until enough cells die (or you find that lucky combination that gives you cancer!)
^,,^ 
@manawyrm @q @ryanc @vidister The ionizing ones will be attenuated within millimeters if this graph is correct https://www.researchgate.net/figure/Upper-plot-Attenuation-length-of-the-VUV-light-in-air-these-values-were-calculated_fig24_334825561 (assuming it continues like that below 80 nm)
@x44203 @q @ryanc @vidister Oh, TIL. Yup, you're totally right. The DNA damage will occur "just" by excitation of the DNA, not by ionization. Thanks!
https://www.wellesu.com/10.1016/j.jphotobiol.2013.06.003
I just skimmed over ^^ which was pretty interesting, I need to give it a detailed read.
@manawyrm @q @ryanc @vidister Yeah, also it really depends on what part is exposed etc, for example eyes can get damage from intense blue light from a similar mechanism, as far as I know that causes some light-sensing chemical to react and too intense light can basically overload the regeneration of that or so (https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9938358/ "When light exposure is longer or more intense, all-trans-retinal accumulates and its activation by blue light can cause oxidative stress that damages the cellular components of the outer segment of the photoreceptors."), or when one gets photosensitive chemicals (specifically polymerization initiators but also some other things) in their skin then even 400 nm light can cause damage.
Blue Light Exposure: Ocular Hazards and Prevention—A Narrative Review
Exposure to blue light has seriously increased in our environment since the arrival of light emitting diodes (LEDs) and, in recent years, the proliferation of digital devices rich in blue light. This raises some questions about its potential deleterious ...
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