Black Light yog dab tsi? Lub teeb dub ua haujlwm li cas

Ultraviolet lub teeb los yog lub teeb uas emits feem ntau ntawm nws lub teeb nyob rau hauv lub ultraviolet cheeb tsam ntawm lub spectrum yog hu ua dub teeb. Vim tias lub teeb dub yog qhov pom tsis tau rau tib neeg lub qhov muag, ib chav uas tau teeb los ntawm nws zoo li tsaus. Ultraviolet lossis UV-A teeb yog lwm cov ntsiab lus rau lub teeb dub. Lub teeb dub, lub teeb dub, lossis Ntoo lub teeb yog ib qho khoom siv uas tawm lub teeb ultraviolet. Lub sij hawm "Wood's lamp" them tribute rau iav UV lim pioneer Robert Williams Wood.

Muaj ntau ntau hom teeb pom kev zoo, xws li lasers, LEDs, incandescent qhov muag teev, thiab cov teeb fluorescent tshwj xeeb. Txij li thaum txhua lub teeb no emits ib qho txawv spectrum ntawm lub teeb, lawv tsis yog tag nrho cov tsim sib npaug.

Hauv tanning lub rooj muag khoom, lub teeb dub yog siv los kawm txog fluorescence, kos kab, tsim cov duab kos duab, ua kom tsis muaj menyuam, thiab kho cov polymers.

Lub npe "Black" Lub hauv paus chiv keeb
Lub teeb dub tseem hu ua "dub" lub teeb txij li lub teeb ultraviolet tsis pom rau tib neeg lub qhov muag. Yog tias lub teeb dub tsuas yog tawm lub teeb ultraviolet, nws yuav tsis pom. Feem ntau ntawm cov teeb pom kev zoo li xiav lossis violet vim lawv qhov luv wavelength pom lub teeb pom kev zoo (xiav rau violet). Vim li no, koj tuaj yeem qhia tau thaum lub teeb ci. Qee lub lasers thiab UV teeb, txawm li cas los xij, tsuas yog emit inaudible hluav taws xob.

Cov photoreceptors ntawm tib neeg retina muaj peev xwm ntes lub teeb dub. Qee cov neeg mob uas tau phais qhov muag yuav muaj qhov pom kev zoo dua hauv UV spectrum. Artificial corneas thiab lo ntsiab muag hloov qhov pom spectrum, muab cov neeg qhov muag pom ntau dua li cov raptors lossis kab.

Txawv Dub Teeb
Lub teeb dub tuaj nyob rau hauv ntau yam duab thiab ntau thiab tsawg. Muaj mercury-vapor teeb, incandescent teeb, fluorescent teeb, lub teeb-emitting diodes (LEDs), thiab lasers. Txij li cov teeb incandescent tsis tawm ntau lub teeb ultraviolet, lawv tsis tsim teeb pom kev zoo dub.
Lub teeb dub incandescent nta lub lim uas cia UV wavelengths dhau thaum thaiv lub teeb pom kev. Kev lag luam teeb pom kev zoo yog hais txog cov khoom no ua "BLB," uas sawv cev rau "blacklight xiav," vim tias lub teeb tsim los ntawm cov qij lossis cov ntxaij lim dej feem ntau muaj faint violet-xiav tinge.
 

Hom Lub Teeb Dub
Muaj ntau yam sib txawv ntawm lub teeb dub. Muaj mercury-vapor teeb, fluorescent teeb, lub teeb-emitting diodes (LEDs), incandescent teeb, thiab fluorescent teeb. Qhov tseeb, lub teeb incandescent tsis tsim lub teeb dub zoo vim lawv tsis tawm ntau lub teeb UV.
Ib lub lim dej ntawm lub teeb dub incandescent tso cai rau UV wavelengths ntws los ntawm thaum thaiv lub teeb pom kev. Kev lag luam teeb pom kev zoo hais txog cov khoom no ua "BLB," uas sawv cev rau "blacklight xiav," vim lawv feem ntau tawm lub teeb nrog lub ntsej muag daj-xiav.

Txawm hais tias lawv kim dua li qhov muag teev ntawm qhov nruab nrab, fluorescent dub teeb ci ntsa iab, lub zog txuag, thiab tsis txhob kub dhau. Lub teeb fluorescent siv hauv "bug zappers" yog ib qho piv txwv zoo. Lub npe "BL" rau hom teeb no sawv cev rau "dub lub teeb." Lub teeb dub yog tsim los ntawm cov teeb fluorescent los ntawm energizing mercury atoms. Electrons nyob rau hauv mercury atoms yog propelled mus rau hauv ib tug siab zog theem ntawm lub zog, thiab thaum lawv rov qab mus rau ib tug qis zog, ruaj khov lub xeev, ultraviolet photons yog emissions. Ib qho phosphor txheej txheej ntawm cov roj fluorescent raj thaiv UV-B thiab UV-C rays txaus ntshai thaum cia UV-B teeb los ntawm. Feem ntau ntawm kev puas tsuaj hluav taws xob zoo li thaiv los ntawm lub teeb lub iav.

Coherent, monochromatic hluav taws xob uas tsis pom tseeb rau tib neeg lub qhov muag yog tsim los ntawm lub teeb dub lossis ultraviolet lasers. Thaum ua hauj lwm nrog xws li gadgets, nws yog ib qho tseem ceeb tshwj xeeb tshaj yog yuav tsum tau hnav lub qhov muag tiv thaiv vim lub teeb yuav ua rau tam sim ntawd thiab mus tas li qhov muag tsis pom zoo li cov ntaub so ntswg hnyav.

Kev siv lub teeb dub
Lub teeb dub muaj ntau yam kev siv. Lub teeb ultraviolet yog siv los ua kom pom cov duab kos duab, kawm txog cov xim fluorescent, txhim kho qhov ci ntawm cov ntaub ntawv phosphorescent, kho cov yas, kos kab, thiab saib fluorescent dyes. Lub teeb dub muaj ntau yam kev siv tshuaj. Kev siv rau lub teeb ultraviolet muaj xws li tshuaj tua kab mob, txheeb xyuas cov kab mob thiab cov kab mob fungal, pob txuv, melanoma, thiab ethylene glycol toxicity, nrog rau kev kho mob jaundice.

Kev Ruaj Ntseg Dub
Vim tias UV hluav taws xob feem ntau lub teeb dub tsim muaj nyob rau hauv thaj av ntev UVA, lawv feem ntau suav tias muaj kev nyab xeeb. Qhov chaw ze tshaj plaws uas pom lub teeb yog qhov no. Lub teeb hluav taws xob dub yuav tsum tsis txhob raug rau lub sijhawm ntev txij li UVA tau txuas nrog tib neeg daim tawv nqaij. UVA tuaj yeem ua mob DNA los ntawm kev nkag mus rau cov txheej txheem epidermal tob. Thaum UVA tsis tsim kev kub hnyiab, nws tuaj yeem deplete vitamin A, cuam tshuam kev tiv thaiv kab mob, ua mob rau collagen, thiab maj nrawm rau cov txheej txheem kev laus ntawm daim tawv nqaij. Los ntawm lub cornea ntawm lub qhov muag, ultraviolet hluav taws xob tuaj yeem ua mob rau lub lens thiab ua rau cataracts.

Qee lub teeb dub tsim ntau UVB lossis UVC teeb. Cov tawv nqaij kub hnyiab tuaj yeem tshwm sim los ntawm cov teeb no. Lub teeb no tuaj yeem ua mob hlwb sai dua vim tias nws muaj lub zog siab dua li UVA lossis pom lub teeb.

Lasers thiab ultraviolet teeb muaj lub zog loj. Lawv tso tawm oxidizing hluav taws xob, uas hlawv tib neeg lub cev thiab rhuav tshem cov kab mob.

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