OlDoinyo Posted June 9, 2018 Share Posted June 9, 2018 On the original topic, I seem to remember that no sunlight reaches the ground below 280 nm. The lower atmosphere itself becomes increasingly opaque below 220 nm and vey opaque below 200 nm (the vacuum UV range.) Any recordable light in the 220-280 nm range must come from extrasolar sources such as lightning, corona discharges, or man-made sources. That is not to say that such cannot exist... Link to comment
Cadmium Posted June 9, 2018 Share Posted June 9, 2018 and then there is the use of ozone for sterilizing... and ozone produced by UVC......just thought I would toss those thoughts into the quagmire. Link to comment
colinbm Posted June 10, 2018 Author Share Posted June 10, 2018 "ozone produced by UVC" B) Link to comment
OlDoinyo Posted June 10, 2018 Share Posted June 10, 2018 Photochemical ozone is the plague if you have ever had to use a xenon arc lamp, which puts out lots of short wave UV--extra ventilation is definitely required. OTOH, some ozone generators actually work this way. Link to comment
Cadmium Posted June 10, 2018 Share Posted June 10, 2018 O2 to O3 via UV.https://en.wikipedia.org/wiki/Ozone%E2%80%93oxygen_cycle Link to comment
dabateman Posted June 10, 2018 Share Posted June 10, 2018 I have fond memories of firing up a circular dichoism machine and smelling the ozone. It was a warning that you didn't wait 30 minutes for the lamp to warm up before firing and everyone knew your mistake. Thats about the sum total of my ozone experience. Link to comment
Cadmium Posted June 10, 2018 Share Posted June 10, 2018 Ozone is often used for cleaning water, air, you name it, and easily produced with electric arc, in home, lighting...Ozone is an oxidizer. Oxygen Reduction Potential.Photography? Link to comment
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