Dab tsi yog Ultraviolet Light?

Lub teeb ultraviolet yog ib hom hluav taws xob hluav taws xob hluav taws xob uas ua rau lub hnub kub hnyiab thiab ci ntsa iab ntawm cov ntawv tshaj tawm dub. Txawm li cas los xij, ntau dhau UV hluav taws xob raug cuam tshuam rau cov ntaub so ntswg nyob.

Lub hnub emits hluav taws xob hluav taws xob hluav taws xob, uas kis tau los ntawm cov nthwv dej lossis cov khoom nrog ntau lub wavelengths thiab zaus. Lub electromagnetic (EM) spectrum hais txog qhov dav ntawm wavelengths. Feem ntau, cov spectrum tau muab faib ua xya thaj chaw hauv kev nce qib ntawm kev nce lub zog thiab zaus thiab txo qis wavelength. Xov tooj cua tsis, microwaves, infrared (IR), pom lub teeb, ultraviolet (UV), X-rays, thiab gamma rays yog qee lub npe nrov rau cov hom hluav taws xob no.

Nyob rau hauv electromagnetic (EM) spectrum, ultraviolet (UV) lub teeb nyob ntawm pom lub teeb thiab X-rays. Nws muaj wavelengths xws li 380 nanometers (1.5 105 ntiv tes) mus rau ib ncig ntawm 10 nm ({5}} ntiv tes), thiab nws cov zaus muaj li ntawm 8 1014 mus rau 3 1016 cycles ib ob los yog hertz (Hz). Cov "Ultraviolet Radiation Guide," luam tawm los ntawm US Navy, hais tias UV feem ntau muab faib ua peb pawg:

UVB yog nruab nrab UV (280-315 nm), UVC nyob deb UV (180-280 nm), thiab UVA yog UV ({2}} nm).

Tsis tas li ntawd, phau ntawv ntxiv, "Radiations nrog wavelengths ntawm 10 nm mus rau 180 nm yog qee zaum hu ua lub tshuab nqus tsev lossis huab cua UV." Cov wavelengths no tsuas yog nthuav tawm hauv lub tshuab nqus tsev vim huab cua thaiv lawv.

Ionization

Cov ntawv cog lus tshuaj tuaj yeem tawg los ntawm UV rays. UV photons tuaj yeem ionize-ib txheej txheem uas electrons cais tawm ntawm atoms-vim lawv lub zog ntau dua. Vim tias qhov chaw tsis txaus, cov atoms coj tus cwj pwm sib txawv thiab ua los yog ua txhaum cov ntawv cog lus tshuaj uas lawv yuav tsis ua. Qhov no tuaj yeem pab nrog kev ua tshuaj lom neeg lossis nws yuav ua rau cov ntaub ntawv thiab cov ntaub so ntswg nyob. Thaum siv los ua kom tsis muaj menyuam, piv txwv li, qhov kev puas tsuaj no tuaj yeem pab tau. Txawm li cas los xij, nws tuaj yeem ua rau puas tsuaj, tshwj xeeb tshaj yog rau daim tawv nqaij thiab qhov muag, uas feem ntau cuam tshuam tsis zoo los ntawm lub zog siab dua UVB thiab UVC rays.

teebmeem ntawm UV

Lub hnub yog lub hauv paus ntawm UV teeb uas tib neeg raug rau ib txwm muaj. Raws li National Toxicology Program (NTP), tsuas yog kwv yees li 10 feem pua ​​​​ntawm hnub ci yog UV, thiab tsuas yog ib feem peb ntawm qhov no nkag mus rau hauv huab cua thiab ncav cuag hauv av. 95 feem pua ​​​​ntawm lub hnub UV teeb uas ncav cuag qhov hluav taws xob yog UVA thiab 5 feem pua ​​yog UVB. Vim tias ozone, molecular oxygen, thiab dej vapor nyob rau hauv cov huab cua sab saud nkaus nqus qhov luv tshaj UV wavelengths, tsis muaj UVC los ntawm lub hnub ci hluav taws xob mus txog lub ntiaj teb. Txawm li cas los xij, NTP's "13th Daim Ntawv Qhia Txog Carcinogens" hais tias "qhov dav-spectrum ultraviolet hluav taws xob [UVA thiab UVB] yog qhov muaj zog tshaj plaws thiab muaj kev phom sij tshaj plaws rau cov tsiaj nyob."

Sunburn

Cov tshuaj tiv thaiv tsis zoo rau kev raug UVB rays yog ib qho suntan. Nyob rau hauv essence, ib tug suntan yog tshwm sim ntawm lub cev tiv thaiv mechanism activating. Qhov no yog tsim los ntawm cov xim hu ua melanin, uas yog tsim los ntawm melanocytes, uas yog cov hlwb ntawm daim tawv nqaij. UV hluav taws xob yog absorbed los ntawm melanin thiab tso tawm thaum tshav kub kub. Lub cev sim tiv thaiv cov hlwb nyob ze ntawm kev puas tsuaj ntxiv los ntawm kev xa melanin rau hauv lawv thaum nws pom lub hnub puas tsuaj. Cov tawv nqaij darkens raws li qhov tshwm sim ntawm cov xim.

Lub DNA ntawm lub hnub puas hlwb tuaj yeem hloov pauv qee zaus, ua rau cov hlwb tsis tuag tab sis hloov mus txuas ntxiv mus ua malignancies. Raws li Chuang, UV teeb randomly tawg DNA thiab cov txheej txheem kho DNA, muab lub peev xwm los tiv thaiv kev tuag.

Qhov kawg tshwm sim yog mob qog noj ntshav ntawm daim tawv nqaij, uas yog hom mob qog noj ntshav tshaj plaws hauv Asmeskas. Rov qab sunburns ua rau tib neeg muaj kev phom sij ntau dua. Raws li daim tawv nqaij Cancer Foundation, cov neeg uas muaj tsib los yog ntau tshaj sunburns yog ob zaug li yuav tau txais melanoma, hom kab mob cancer ntawm daim tawv nqaij tuag.

Qhov thib ob UV qhov chaw

Txhawm rau muab UV hluav taws xob, ntau yam khoom tsim tau tsim. Lub Koom Haum Saib Xyuas Kev Noj Qab Haus Huv tau hais tias "Cov khoom siv dag zog muaj xws li tanning lub rooj muag khoom, lub teeb dub, kho cov teeb, cov teeb hluav taws xob, cov teeb hluav taws xob mercury, teeb halogen, cov teeb hluav taws xob siv hluav taws xob ntau, cov khoom siv hluav taws xob thiab cov khoom siv hluav taws xob, thiab qee hom lasers."

280nm UV Lub teeb Tube

Nta:

● Nto mount high-power ntaus ntawv
● Featuring siab brightness ua ke nrog ib tug compact loj
● Haum rau txhua yam kev siv teeb pom kev zoo xws li kev teeb pom kev dav dav, flash, chaw, teeb liab, kev lag luam thiab kev lag luam teeb pom kev zoo.

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