Video: Dab tsi yog qhov zoo ntawm electron microscope thiab lub teeb microscope?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Electron microscopes muaj qee qhov zoo ntawm optical microscopes: Qhov zoo tshaj plaws yog tias lawv muaj ntau dua daws teeb meem thiab yog li ntawd kuj tseem muaj peev xwm ntawm qhov loj dua (txog 2 lab lub sijhawm). Lub teeb microscopes tuaj yeem pom qhov muaj txiaj ntsig zoo tsuas yog mus txog 1000-2000 zaug.
Ib yam li ntawd, qhov zoo ntawm electron microscope yog dab tsi?
Electron microscopes muaj ob qhov txiaj ntsig tseem ceeb thaum piv rau lub teeb microscopes: Lawv muaj ntau qhov kev nthuav dav ntau dua (tuaj yeem ntes cov qauv me me) Lawv muaj ntau dua. daws teeb meem (tuaj yeem muab cov duab meej thiab meej dua)
Tom qab, lo lus nug yog, dab tsi yog qhov zoo thiab qhov tsis zoo ntawm lub tshuab ntsuas hluav taws xob? Electron Microscope Disadvantages Lub ntsiab qhov tsis zoo yog cov nqi, qhov loj me, kev saib xyuas, kev cob qhia kws tshawb fawb thiab cov duab kos duab uas tshwm sim los ntawm kev npaj cov qauv. Hom no microscope yog ib qho loj, cumbersome, kim khoom, tsis tshua muaj siab rau kev co thiab sab nraud magnetic teb.
Tsis tas li ntawd, qhov zoo thiab qhov tsis zoo ntawm lub teeb tsom iav puas muaj qhov sib piv nrog lub tshuab ntsuas hluav taws xob?
Nqi / Muaj: Lub teeb microscopes pheej yig dua electron microscopes . Tswj cov duab tsim: Teeb ntawm iav lo ntsiab muag, kab teeb ntawm electrons tuaj yeem tsom siv electromagnets vim qhov tsis zoo ntawm tus nqi electrons . Kev daws teeb meem *: Electron microscopes muaj daws teeb meem ntau dua lub teeb microscopes.
Dab tsi yog qhov txawv ntawm electron microscope thiab lub teeb microscope?
Lub ntsiab qhov sib txawv ntawm lub teeb microscope thiab electron microscope yog tias ib electron microscope siv beams ntawm electrons kom nthuav cov duab ntawm ib yam khoom thaum lub teeb microscope siv rays ntawm pom teeb los tsim cov duab zoo heev ntawm thaj chaw me me ntawm cov ntaub ntawv lossis cov qauv lom neeg.
Pom zoo:
Lub teeb sib tham txog tej yam ntuj tso thiab manmade qhov chaw ntawm lub teeb yog dab tsi?
Tej qhov chaw ntawm lub teeb muaj xws li lub hnub, hnub qub, hluav taws, thiab hluav taws xob nyob rau hauv cua daj cua dub. Tseem muaj qee cov tsiaj thiab nroj tsuag uas tuaj yeem tsim lawv tus kheej lub teeb, xws li fireflies, jellyfish, thiab nceb. Qhov no hu ua bioluminescence. Artificial light yog tsim los ntawm tib neeg
Dab tsi yog qhov txawv ntawm magnification thiab daws teeb meem ntawm ib daim duab nyob rau hauv lub tshuab microscope?
Magnification yog lub peev xwm ua kom cov khoom me me zoo li loj dua, xws li ua kom pom cov kab mob microscopic. Kev daws teeb meem yog qhov muaj peev xwm paub qhov txawv ntawm ob yam khoom ntawm ib leeg. Lub teeb microscopy muaj kev txwv rau ob qho tib si nws qhov kev daws teeb meem thiab nws qhov loj
Dab tsi yog qhov txawv ntawm qhov sib txawv ntawm qhov sib txawv thiab qhov sib txawv ntawm qhov ntab?
Integers thiab floats yog ob yam sib txawv ntawm cov ntaub ntawv tus lej. Ib tus lej (feem ntau hu ua anint) yog tus lej tsis muaj tus lej lej. Float isa floating-point number, uas txhais tau hais tias nws yog tus lej uas muaj tus lej lej. Floats siv thaum xav tau ntau dua
Qhov txawv ntawm qhov loj ntawm ib tug proton thiab qhov loj ntawm ib tug electron yog dab tsi?
Protons thiab neutrons muaj kwv yees li qub, tab sis lawv yog ob qho tib si loj dua li cov hluav taws xob (kwv yees li 2,000 npaug loj li electron). Tus nqi zoo ntawm ib qho proton yog sib npaug hauv qhov loj rau qhov tsis zoo ntawm tus electron
Dab tsi yog qhov txawv ntawm wavelength ntawm lub teeb liab thiab lub teeb violet?
Violet lub teeb yog hluav taws xob hluav taws xob hluav taws xob nrog wavelengths ntawm 410 nanometers thiab lub teeb liab muaj awavelength ntawm 680 nanometers. Qhov ntau ntawm wavelengths (400 - 700 nm) ntawm lub teeb pom kev yog nyob nruab nrab ntawm lub electromagnetic spectrum (Fig.1)