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-as of [20 SEPTEMBER 2024]–
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-“ultraviolet (UV) light” is an ‘electro-magnetic radiation’ with a ‘wavelength’ from ‘400 nm’ (aka ‘750 THz’) to 10 nm (30 PHz)-
(shorter than that of “visible light” but longer than “X-rays”*)
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(though usually ‘invisible’, under some conditions ‘children’ + ‘young adults’ can see ‘ultraviolet’ down to ‘wavelengths’ of about ‘310 nm’, and people with ‘aphakia’ (aka ‘missing lens’) can also see some ‘UV wavelengths’)
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(‘near-UV’ is ‘visible’ to some ‘insects’ and ‘birds’)
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(‘UV radiation’ is present in ‘sunlight’, and is produced by ‘electric arcs’ and ‘specialized lights’ such as ‘mercury-vapor lamps’, ‘tanning lamps’, and ‘black lights’)
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(although lacking the ‘energy’ to ‘ionize atoms’, long-wavelength ‘ultraviolet radiation’ can cause ‘chemical reactions’, and causes many substances to ‘glow’ or ‘fluoresce’)
(consequently, ‘biological effects’ of ‘UV’ are greater than ‘simple heating effects’, and many practical applications of ‘UV radiation’ derive from its ‘interactions’ with ‘organic molecules’)
(‘suntan’, ‘freckling’, and ‘sunburn’ are familiar effects of ‘over-exposure’, along with higher risk of ‘skin cancer’)
(‘living things’ on ‘dry land’ would be severely damaged by ‘ultraviolet radiation’ from the ‘sun’ if most of it were not filtered out by the earth’s atmosphere, particularly the “ozone layer”)
(more proof of “earth” as “alive”?)
(‘more-energetic’ / ‘shorter-wavelength’ “extreme” UV below ‘121 nm’ ionizes air so strongly that it is absorbed before it reaches the ground)
(‘ultraviolet’ is also responsible for the formation of bone-strengthening ‘vitamin D’ in most ‘land vertebrates’, including ‘humans’)
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(the ‘UV spectrum’ thus has effects both ‘beneficial’ + ‘harmful’ to ‘human health’)
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*👨🔬🕵️♀️🙇♀️*SKETCHES*🙇♂️👩🔬🕵️♂️*
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👈👈👈☜*“IONIZING RADIATION”* ☞ 👉👉👉
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💕💝💖💓🖤💙🖤💙🖤💙🖤❤️💚💛🧡❣️💞💔💘❣️🧡💛💚❤️🖤💜🖤💙🖤💙🖤💗💖💝💘
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*🌈✨ *TABLE OF CONTENTS* ✨🌷*
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🔥🔥🔥🔥🔥🔥*we won the war* 🔥🔥🔥🔥🔥🔥