Video: Maxwell qhov kev sib npaug tau tshwm sim li cas?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Teeb yog electromagnetic nthwv dej: qhov no tau pom los ntawm Maxwell nyob rau hauv 1864, raws li ib tug tshwm sim kev sib npaug c = 1/(e0m0)1/2 Luas = 2,998 x 108m / s tau pom, txij li qhov ceev ntawm teeb tau raug ntsuas kom raug los ntawm qhov ntawd, thiab nws qhov kev pom zoo nrog c tsis zoo li yuav yog qhov xwm txheej.
Ib yam li ntawd, koj tuaj yeem nug, leej twg tsim Maxwell qhov sib npaug?
Kev ywj pheej ntawm Heaviside, Heinrich Hertz kuj tau muab cov qauv yooj yim ntawm Maxwell's Equations , txawm tias tom qab ntawd nws tau lees paub qhov ua ntej ntawm Heaviside txoj haujlwm. Xyoo 1888 Hertz tau ua nws txoj haujlwm tseem ceeb tshaj plaws nrog kev tshawb pom ntawm xov tooj cua nthwv dej.
plaub Maxwell qhov sib npaug yog dab tsi? Maxwell qhov sib npaug yog ib txheej ntawm plaub sib txawv kev sib npaug uas tsim lub hauv paus theoretical rau piav txog classical electromagnetism: Gauss txoj cai: Cov nqi hluav taws xob tsim hluav taws xob. Gauss txoj cai rau hlau nplaum: Tsis muaj hlau nplaum monopoles. Qhov sib nqus flux hla ntawm qhov chaw kaw yog xoom.
Kuj paub, Maxwell thawj kab zauv yog dab tsi?
1. Qhov no kev sib npaug hais tias qhov hluav taws xob ua haujlwm zoo los ntawm qhov chaw ntim ib lub ntim yog sib npaug rau tag nrho cov nqi hauv lub ntim. Kom nco ntsoov daim ntawv tseem ceeb ntawm Maxwell's Equation No. 1, xav tias ib tug nqi q, nyob rau hauv ib lub ntim, yuav tsum sib npaug zos rau lub ntim nqi ceev, r, lub sij hawm lub ntim.
Maxwell nrhiav tau nws qhov sib npaug li cas?
Hauv nws thawj zaug sim, ib daim ntawv 1855 hu ua "Rau Faraday's Lines of Force," Maxwell tsim ib qho qauv los ntawm kev sib piv, qhia tias kev sib npaug uas piav qhia txog cov kua dej tsis txaus kuj tuaj yeem siv los daws cov teeb meem uas tsis hloov hluav taws xob lossis cov chaw sib nqus.
Pom zoo:
Yuav daws qhov tsis sib npaug ntawm cov kab sib npaug thiab cov kab sib npaug sib npaug li cas?
Kev daws qhov tsis sib npaug ntawm qhov sib npaug yog zoo ib yam li kev daws cov kab sib npaug. Qhov sib txawv tseem ceeb yog koj tig lub cim tsis sib xws thaum faib lossis muab faib los ntawm tus lej tsis zoo. Graphing linear inequalities muaj ob peb qhov sib txawv ntxiv. Qhov uas yog qhov ntxoov ntxoo muaj xws li qhov tseem ceeb uas qhov kev tsis sib xws ntawm cov kab tawm muaj tseeb
Tus qauv yuav pab nrhiav qhov tshwm sim ntawm qhov kev tshwm sim sib xyaw li cas?
Lub ntsiab lus ntawm Qhov Muaj Peev Xwm Txheej Txheej Txheej Txheej Txheej Txheej Txheej Txheej Txheej Txheej Txheej Txheej yog ib qho uas muaj ntau tshaj li qhov ua tau. Kev txiav txim siab qhov yuav tshwm sim ntawm qhov kev tshwm sim sib xyaw suav nrog kev nrhiav cov lej ntawm qhov tshwm sim ntawm tus kheej cov xwm txheej thiab, yog tias tsim nyog, tshem tawm qhov muaj feem sib tshooj
Puas yog txhua qhov sib npaug sib npaug sib npaug?
Thawj qhov sib npaug sib npaug yog qhov tseeb yog tias nws muaj kev txuag kom muaj nuj nqis. Piv txwv li, qhov sib npaug sib cais yeej ib txwm muaj tseeb, txij li lub ntsiab lus lawv yog ntawm daim ntawv: M(y) + N(t) = 0, yog li ϕ(t, y) = A(y) + B(t) yog a khaws cia kom muaj nuj nqis
Puas yog nws ua tau rau ib qho kev sib npaug ntawm ob txoj kab sib npaug kom tsis muaj kev daws teeb meem piav qhia koj qhov laj thawj?
Cov kab ke ntawm kab sib npaug tuaj yeem tsuas muaj 0, 1, lossis ib qho kev daws teeb meem tsis kawg. Ob kab no tsis tuaj yeem hla ob zaug. Cov lus teb raug yog tias qhov system muaj ib qho kev daws teeb meem. Total Number of Points Number of 2-Point Baskets Number of 3-Point Baskets 17 4 (8 ntsiab lus) 3 (9 points) 17 1 (2 points) 5 (15 points)
Dab tsi yog qhov sib txawv ntawm cov kab lus sib npaug thiab qhov sib npaug sib npaug?
Cov kab lus sib npaug muaj qhov muaj txiaj ntsig zoo ib yam tab sis tau nthuav tawm nyob rau hauv ib hom ntawv sib txawv uas siv cov khoom ntawm cov lej xws li ax + bx = (a + b) x yog cov kab lus sib npaug. nruj me ntsis, lawv tsis yog 'sib npaug', yog li peb yuav tsum siv 3 kab sib luag hauv 'sib npaug' es tsis yog 2 raws li qhia ntawm no