Lub hauv paus ntsiab lus ntawm cov hlau ntes kuj yog yooj yim heev. Nws siv cov high-frequency tam sim no txuas nrog cov hlau kauj, uas yog sib npaug rau lub hollow kauj uas tuaj yeem tsim cov hlau nplaum. Yog hais tias ib yam khoom hlau tshwm nyob rau hauv los yog nyob ze ntawm lub hollow kauj, cov alternating magnetic teb yuav induce eddy tam sim no ntawm cov hlau, uas yuav cuam tshuam rau lub magnetic teb nyob rau hauv lub hollow kauj. Lub sijhawm no, saib xyuas cov kev hloov pauv ntawm cov chaw sib nqus no, Koj tuaj yeem nkag siab seb puas muaj cov khoom hlau nyob ze!
Raws li lub hauv paus ntsiab lus ntawm kev tshawb nrhiav, cov khoom siv hlau tuaj yeem muab faib ua hom electromagnetic induction, X-ray nrhiav hom thiab microwave nrhiav hom. Tau kawg, X-rays yog hom kev sib kis, uas yuav tsum tau xa mus rau ntawm ib kawg thiab tau txais ntawm lwm qhov kawg, lossis muaj X-ray reflecting nto. Piv txwv li, thaum ua kev kho hniav radiography, ib qho kev xav ntawm qhov chaw yuav tsum tau teem rau tom qab ntawm tus hniav. Yog li ntawd, cov khoom siv hlau feem ntau xa mus rau hom electromagnetic. Cov nram qab no ob lub ntsiab lus zoo heev hlau ntes tau pom zoo:
Tsawg zaus (VLF) hlau ntes, tseem hu ua inductive tshuav hlau ntes
Qhov no yog qhov nrov tshaj plaws hlau ntes tam sim no. Nws muaj ob lub coils, ib qho yog lub nplhaib sab nraud rau kev xa tawm, thiab lwm qhov yog lub nplhaib puab rau kev txais. Cov coil tau txais tuaj yeem teeb tsa nrog lub lim dej kom lim tawm qhov cuam tshuam sib nqus ntawm cov xaim hluav taws xob, tab sis nws yuav tsis cuam tshuam cov electromagnetic yoj tawm los ntawm cov khoom siv hauv av hauv av tom qab lub nplhaib txheej txheej tau pib. Tom qab lub electromagnetic yoj yog amplified los ntawm lub puab nplhaib tau txais kauj, Nws tuaj yeem tso tawm ntawm lub vijtsam zaub hauv daim ntawv ceeb toom lossis electromagnetic yoj tus lej tus yam ntxwv, thiab qhov tob tuaj yeem txiav txim siab raws li tus nqi.
