Txhawm rau tham txog yuav ua li cas pom qhov hluav taws xob ultraviolet. Infrared yog ib qho ntawm ntau qhov pom tsis txawv ntawm lub hnub. Nws tau tshawb pom los ntawm tus kws tshawb fawb British Herschel (1738.11-1822.8) xyoo 1800. Nws tseem hu ua infrared tshav kub thiab muaj lub zog ua kom muaj cua sov.
Tam sim no muaj" infrared" dhau li ntawm liab, puas muaj" ultraviolet" dhau li ntawm ntshav? Cov teeb meem zoo li no tsis yog peb tib neeg ib txwm xav li ntawd, kws tshawb fawb yeej zoo ib yam li peb, thiab muaj lub hauv paus rau tib neeg ntseeg tias"" Muaj qhov hluav taws xob tsis pom nyob sab nraud, yog li qhov pom tau tawg yuav tsum nyob sab nraud paj yeeb kawg ntawm qhov pom tau pom. Yog li kuv pib sim.
Xyoo 1801, tus kws tshawb fawb tau xub muab ib daim ntawv tso rau hauv cov nyiaj chloride, thiab tom qab ntawd muab tso rau ntawm thaj tsam violet ntawm qhov pom ntawm lub J prism. Nws pom tias daim ntawv nyob rau sab nraud ntawm lub teeb paj yeeb tau txaij dub tawv, qhia tias qhov no ntawm daim ntawv tau tawg los ntawm kev tsis pom ntawm hluav taws xob. Nws hu ua lub teeb pom kev tsis pom ze ze lub teeb daj" deoxygenation rays" ;, qhov no yog qhov peb hu ua ultraviolet rays. Nws kuj tseem hu ua lub teeb pom kev tsis pom ze ze lub teeb liab" oxidation zuam" kab, uas yog, duab ci sab xis. Txij thaum ntawd los, noob neej tau txuas ntxiv siv cov duab hluav taws xob hluav taws xob tua muaj txiaj ntsig rau noob neej.
Nws yog tus paub txog neeg German tus ritter. Ritter yug hauv Samnitz thaum Lub Kaum Ob Hlis 1776. Nws kawm tshuaj hauv University of Jena los ntawm 1791 txog 1795, tab sis xyoo 1797 Ritter pib koom rau hauv kev tshawb fawb hluav taws xob thiab electrochemical. Nws yog tus thawj coj hauv kev kawm txog kev siv hluav taws xob galvanic hauv Tebchaws Yelemees. Thaum lub Cuaj Hlis 1800, nws tau xa tawm daim ntawv tshaj tawm. Hauv kev sim dej electrolysis, nws ntse sau ob hom roj (koj yuav tsum paub txhua yam tias lawv yog dab tsi), thiab tooj liab electrolyzed los ntawm bile alum.
