Dab tsi yog qhov theoretical txwv ntawm magnification rau lub tshuab tsom iav qhov muag?
Qhov kev daws teeb meem ntawm lub tshuab ntsuas qhov muag yog hais txog 0.2 microns, uas yog sib npaug ntawm qhov loj ntawm 1500 txog 2000 zaug; Txhawm rau kom ua tiav qhov loj dua, yuav tsum siv lub tshuab hluav taws xob hluav taws xob lossis lub tshuab ntsuas qhov tob.
Lub iav magnifying tuaj yeem tsom lub teeb kom ua tiav cov txiaj ntsig zoo, thiab kev sib xyaw ntawm cov iav tsom iav tuaj yeem tau txais lub tshuab tsom iav kho qhov muag; qhov kev txwv ntawm optical microscope yog txwv los ntawm lub wavelength, thiab nws yog tsis yooj yim sua kom magnify infinitely.
Feem ntau, qhov kev daws teeb meem ntawm lub tshuab kho qhov muag ntawm lub teeb tsa lub teeb yog ib nrab ntawm lub teeb ntawm lub teeb, thiab lub wavelength ntawm pom lub teeb nyob nruab nrab ntawm 4 00 thiab 760 nm, yog li qhov kev daws teeb meem txwv ntawm optical microscope yog 200 nm (0.2 microns). Cov khoom me dua 0.2 microns tsis tuaj yeem daws tau los ntawm lub tshuab ntsuas qhov muag, ib yam li qhov kev daws teeb meem ntawm tib neeg txhais tes tsis tuaj yeem tshaj qhov nrug me me ntawm tactile hlwb.
Lub magnification yog ib tug subjective nqe lus. Nws yog txhais raws li qhov piv ntawm qhov loj ntawm cov khoom pom los ntawm tib neeg lub qhov muag mus rau qhov loj me thaum lub photopic nrug yog 25cm. Qhov kev daws teeb meem ntawm optical microscope ntawm 0.2 microns yog sib npaug ntawm qhov loj ntawm 1500 ~ 2000 zaug, uas yog txaus rau peb kom nkag siab txog cov qauv ntawm cov cell.
Kev nthuav dav ntau dua tuaj yeem ua tiav yog tias peb siv cov khoom siv hluav taws xob nrog cov wavelengths luv dua, tab sis qhov no yog dhau qhov wavelength ntau ntawm cov teeb pom kev zoo; Xyoo 1931, British physicist Luska tau tsim lub tshuab ntsuas hluav taws xob, raws li lub hauv paus ntsiab lus ntawm nthwv dej-particle dual, lub teeb hluav taws xob muaj luv dua de Broglie yoj wavelength, yog li nws tuaj yeem ua tiav qhov kev daws teeb meem me dua.
Lub accelerating voltage ntawm electrons sib haum mus rau nws tus kheej wavelength. Thaum qhov hluav taws xob yog 1{{1}0 kV, lub wavelength ntawm lub teeb hluav taws xob yog li 0.004nm (qhov kev daws teeb meem tiag tiag tsuas yog ncav cuag 0.2nm), uas tseem tsawg dua qhov wavelength ntawm pom lub teeb, yog li qhov kev daws teeb meem ntawm lub tshuab ntsuas hluav taws xob nyob deb Lub tshuab ntsuas hluav taws xob ultra-optical tuaj yeem ua tiav qhov loj ntawm 3 lab lub sijhawm thiab tuaj yeem paub qhov txawv me me xws li kab mob, mitochondria, thiab DNA.
