2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
UVA rays UVA rays Qhov zoo tshaj plaws wavelengths rau tshuaj tua kab mob yog ze rau 260 nm. Mercury vapor teeb tej zaum yuav raug categorized li tsawg-siab (xws li amalgam) los yog nruab nrab-siab teeb. Lub teeb hluav taws xob qis UV muaj kev ua haujlwm siab (approx. 35% UV-C) tab sis qis zog, feem ntau 1 W / cm zog ceev (lub zog ib chav tsev ntawm qhov ntev). https://en.wikipedia.org › Ultraviolet_germicidal_irradiation
Ultraviolet germicidal irradiation - Wikipedia
tuaj yeem nkag mus rau koj cov tawv nqaij ntau dua thiab ua rau koj cov tawv nqaij ua kom muaj hnub nyoog ntxov. Kwv yees li 95 feem pua ntawm UV rays uas ncav cuag hauv av yog UVA rays. Lub lwm 5 feem pua ntawm UV rays yog UVB. Lawv muaj lub zog ntau dua li UVA rays, thiab feem ntau ua rau cov khaubncaws sab nraud povtseg ntawm koj cov tawv nqaij, ua rau tshav ntuj.
UVA thiab UVB qhov sib txawv yog dab tsi?
Ultraviolet A (UVA) muaj lub wavelength ntev dua, thiab cuam tshuam nrog kev laus ntawm daim tawv nqaij. Ultraviolet B (UVB) muaj qhov luv dua wavelength thiab cuam tshuam nrog tawv nqaij.
3 hom rays yog dab tsi?
UV hluav taws xob tau faib ua peb hom: ultraviolet A (UVA), ultraviolet B (UVB), thiab ultraviolet C (UVC). Cov pab pawg no yog ua raws li qhov ntsuas ntawm lawv qhov wavelength, uas ntsuas hauv nanometers (nm=0.000000001 meters lossis 1 × 10-9 meters).
UVA ua li cas rau koj cov tawv nqaij?
UVA rays muaj lub zog tsawg tshaj plaws ntawm UV rays. Cov rays no tuaj yeem ua rau cov tawv nqaij mus rau hnub nyoog thiab tuaj yeemua rau qee qhov kev puas tsuaj rau cov hlwb 'DNA. UVA rays feem ntau yog txuas rau lub sijhawm ntev ntawm daim tawv nqaij xws li wrinkles, tab sis lawv kuj xav tias ua lub luag haujlwm hauv qee cov qog nqaij hlav ntawm daim tawv nqaij.
Puas yog UVA thiab UVB rays tuaj yeem thaiv 100% los ntawm tshuaj pleev thaiv hnub?
Tsis muaj tshuaj pleev thaiv hnub thaiv UV hluav taws xob 100%. Tab sis lawv cia koj nyob nraum zoov ntev dua ua ntej koj cov tawv nqaij pib redden. Kev siv tshuaj pleev thaiv hnub tsis tau txhais hais tias koj tuaj yeem nyob hauv lub hnub tsis txwv lub sijhawm. Kev puas tsuaj rau koj cov tawv nqaij hlwb tseem tshwm sim.
Pom zoo:
Thaum lub caij ntuj no solstice lub hnub rays ci rau ntawm?
Thaum lub caij ntuj no solstice, lub hnub ci ncaj qha tshaj plaws ntawm lub Tropic ntawm Capricorn Tropic ntawm Capricorn Lub Tropic ntawm Capricorn (los yog Southern Tropic) yog lub voj voog ntawm latitude uas muaj cov ntsiab lus subsolar ntawm lub Kaum Ob Hlis Ntuj (los yog yav qab teb) solstice.
Puas gamma rays pom rau tib neeg lub qhov muag?
Lub teeb peb tuaj yeem pom, ua los ntawm cov xim ntawm tus zaj sawv, tsuas yog ib feem me me ntawm electromagnetic spectrum. Lwm hom teeb muaj xws li xov tooj cua nthwv dej, microwaves, hluav taws xob infrared, ultraviolet rays, X-rays thiab gamma rays - tag nrho cov uas yog imperceptible rau tib neeg ob lub qhov muag.
Puas manta rays muaj barbs?
Manta rays tsis muaj qhov tsis zoo uas pom ntawm lawv cov tails, thaum stingrays siv barb los ua kev tiv thaiv. … Txoj kev pub mis no yog qhov zoo tshaj plaws rau manta rays thaum lawv siv lawv lub sijhawm nyob hauv ntug dej hiav txwv thiab pelagic qhov chaw uas lawv tuaj yeem ua luam dej los ntawm kab dej sau cov kab mob me me hauv hiav txwv.
Puas cathode rays zoo lossis tsis zoo?
Cathode rays taug kev hauv cov kab ncaj thiab nrum duab ntxoov ntxoo. Tsis zoo li lub teeb, txawm li cas los xij, ca-thode rays raug nyiam mus rau lub phaj zoo. Qhov no ua rau qhov xaus tias cov kab hluav taws xob cathode yog tsis zoo them. Puas cathode rays zoo them?
Dab tsi yog gamma rays?
Ib gamma ray, tseem hu ua gamma hluav taws xob, yog ib daim ntawv nkag mus ntawm hluav taws xob hluav taws xob tshwm sim los ntawm cov hluav taws xob tawg ntawm atomic nuclei. Nws muaj qhov luv tshaj wavelength electromagnetic tsis thiab thiaj li muab lub zog photon siab tshaj.
