Electromagnetic Radiation vs Electromagnetic Spectrum
Electromagnetic radiation thiab electromagnetic spectrum yog ob lub ntsiab lus dav siv hauv electromagnetic txoj kev xav. Nws yog ib qho tseem ceeb kom muaj kev nkag siab meej hauv cov xwm txheej no kom ua tau zoo hauv cov haujlwm no. Kab lus no yuav hais txog cov ntsiab lus, qhov sib xws thiab qhov sib txawv ntawm cov hluav taws xob hluav taws xob hluav taws xob thiab cov hluav taws xob hluav taws xob.
Electromagnetic Radiation
hluav taws xob hluav taws xob, feem ntau hu ua EM hluav taws xob, yog thawj zaug tau thov los ntawm James Clerk Maxwell. Qhov no tom qab tau lees paub los ntawm Heinrich Hertz uas ua tiav thawj EM nthwv dej. Maxwell tau muab cov qauv nthwv dej rau cov hluav taws xob thiab sib nqus nthwv dej thiab ua tiav qhov kev ntsuas ceev ntawm cov nthwv dej no. Txij li thaum lub nthwv dej no sib npaug rau qhov kev sim ntawm qhov ceev ntawm lub teeb, Maxwell tau hais tias lub teeb yog ib daim ntawv ntawm EM nthwv dej. Electromagnetic nthwv dej muaj ob qho tib si hluav taws xob thiab ib qho chaw sib nqus oscillating perpendicular rau ib leeg thiab perpendicular rau cov kev taw qhia ntawm yoj propagation. Txhua qhov hluav taws xob hluav taws xob muaj tib qhov kev tshaj tawm hauv lub tshuab nqus tsev. Qhov zaus ntawm electromagnetic yoj txiav txim siab lub zog khaws cia hauv nws. Tom qab ntawd nws tau pom tias siv quantum mechanics tias cov nthwv dej no, qhov tseeb, yog pob ntawv ntawm nthwv dej. Lub zog ntawm pob ntawv no nyob ntawm qhov zaus ntawm nthwv dej. Qhov no qhib lub teb ntawm nthwv dej - particle duality ntawm teeb meem. Tam sim no nws tuaj yeem pom tias hluav taws xob hluav taws xob tuaj yeem suav tias yog nthwv dej thiab hais. Ib yam khoom, uas tau muab tso rau hauv qhov kub thiab txias tshaj qhov xoom xoom, yuav tawm EM nthwv dej ntawm txhua lub wavelength. Lub zog, uas yog qhov siab tshaj plaws ntawm photons tawm, nyob ntawm qhov kub ntawm lub cev.
Electromagnetic Spectrum
Electromagnetic nthwv dej tau muab faib ua ntau thaj chaw raws li lawv lub zog. X-rays, ultraviolet, infrared, pom, xov tooj cua tsis muaj tsawg ntawm lawv. Txhua yam peb pom yog pom vim qhov pom thaj tsam ntawm electromagnetic spectrum. Ib qho spectrum yog ib zajlus ntawm kev siv zog piv rau lub zog ntawm cov hluav taws xob hluav taws xob. Lub zog kuj tuaj yeem sawv cev hauv wavelength lossis zaus. Ib qho spectrum txuas ntxiv yog ib qho spectrum uas tag nrho cov wavelengths ntawm cheeb tsam xaiv muaj kev siv zog. Lub teeb dawb zoo meej yog lub spectrum txuas ntxiv mus rau thaj tsam pom. Nws yuav tsum tau muab sau tseg tias, nyob rau hauv kev xyaum, nws yog tsis yooj yim sua kom tau ib tug zoo meej spectrum. Ib qho kev nqus spectrum yog cov spectrum tau txais tom qab xa cov spectrum tas li los ntawm qee yam khoom. Ib qho emission spectrum yog lub spectrum tau txais tom qab lub spectrum tas li raug tshem tawm ntawm qhov nqus spectrum tom qab excitation ntawm cov electrons. Absorption spectrum thiab emission spectrum yog qhov tseem ceeb heev hauv kev nrhiav tshuaj lom neeg cov khoom siv. Qhov nqus los yog emission spectrum ntawm ib yam khoom yog tshwj xeeb rau cov khoom.
Qhov txawv ntawm Electromagnetic Radiation thiab Electromagnetic Spectrum yog dab tsi?
• EM hluav taws xob yog qhov tshwm sim los ntawm kev sib cuam tshuam ntawm hluav taws xob thiab hlau nplaum.
• EM spectrum yog ib txoj hauv kev siv los piav txog EM hluav taws xob.
• EM hluav taws xob yog lub tswv yim zoo, thaum EM spectrum yog qhov ntsuas ntau.
• Lub tswv yim ntawm EM hluav taws xob ib leeg tsis muaj txiaj ntsig. EM spectrum muaj ntau daim ntawv thov thiab siv.
