Lub tsheb teeb teeb pom kev zoo
Cov khoom siv hluav taws xob hauv tsheb yuav raug hloov maj mam hnav thiab tsim kua muag. Hauv qee lub teeb pom kev zoo, cov cim qhia ntawm kev laus tuaj yeem pom ntawm qhov chaw ntawm lub iav qhov muag teev.
Kev maj mam hnav ntawm cov teeb yog qhov tshwm sim ntawm cov txheej txheem thermochemical tshwm sim hauv lawv. Xov xov hauv qhov muag teev 
Lawv yog ua los ntawm tungsten, ib tug hlau nrog ib tug heev melting point ntawm txog 3400 degrees Celsius. Nyob rau hauv ib lub teeb pom kev zoo tib yam, tus neeg hlau atoms raug tshem tawm ntawm nws thaum lub filament yog ignited. Qhov no tshwm sim ntawm evaporation ntawm tungsten atoms ua rau cov filament maj mam poob thickness, txo nws txoj kev hla seem. Nyob rau hauv lem, lub tungsten atoms detached los ntawm lub filament nyob rau hauv lub puab nto ntawm lub khob khob ntawm lub hwj. Nyob ntawd lawv tsim ib tug precipitate, vim hais tias lub teeb maj mam darkens. Qhov no yog ib lub cim qhia tias cov xov yuav hlawv tawm. Nws yog qhov zoo dua tsis txhob tos nws, tsuas yog hloov nws nrog ib qho tshiab sai li sai tau thaum koj pom lub teeb zoo li no.
Halogen teeb yog ntau ruaj dua li cov pa, tab sis lawv tsis pom cov cim ntawm hnav. Txhawm rau txo qis cov evaporation ntawm tungsten atoms los ntawm filament, lawv tau ntim rau hauv siab nrog cov pa roj los ntawm bromine. Thaum lub ci ntsa iab ntawm cov filament, lub siab nyob rau hauv lub raj mis nce ntau zaus, uas ua rau muaj kev cuam tshuam zoo ntawm tungsten atoms. Cov uas evaporate react nrog cov roj halogen. Lub resulting tungsten halides yog dua tso rau ntawm filament. Yog li ntawd, deposits tsis tsim nyob rau hauv lub puab nto ntawm lub hwj, qhia hais tias cov xov yog yuav luag tag.
