Ntau lub physics qee zaum tseem tsis nkag siab. Thiab nws tsis yog ib txwm hais tias ib tug neeg tsuas yog nyeem me ntsis ntawm cov ncauj lus no. Qee lub sij hawm cov khoom siv tau muab rau hauv txoj hauv kev uas nws yooj yim ua tsis tau rau tus neeg uas tsis paub txog lub hauv paus ntawm physics kom nkag siab nws. Ib ntu nthuav dav uas tib neeg tsis tas yuav nkag siab thawj zaug thiab tuaj yeem nkag siab yog lub sijhawm oscillations. Ua ntej piav qhia txog txoj kev xav ntawm lub sijhawm oscillations, cia peb tham me ntsis txog keeb kwm ntawm qhov kev tshawb pom ntawm qhov tshwm sim no.
History
Theoretical foundations of periodic oscillations twb paub nyob rau hauv ancient ntiaj teb no. Cov neeg pom yuav ua li cas cov nthwv dej txav sib npaug, yuav ua li cas lub log tig, dhau los ntawm tib lub ntsiab lus tom qab qee lub sijhawm. Nws yog los ntawm cov zoo li yooj yim phenomena uas lub tswvyim ntawm oscillations originated.
Thawj cov pov thawj ntawm cov lus piav qhia ntawm oscillations tsis tau khaws cia, tab sis nws paub tseeb tias ib qho ntawm lawv cov hom feem ntau (xws li, electromagnetic) tau kwv yees los ntawm Maxwell xyoo 1862. Tom qab 20 xyoo, nws txoj kev xav tau lees paub. Tom qab ntawd Heinrich Hertz tau ua ntau qhov kev sim ua pov thawj tias muaj cov hluav taws xob tsis sib xws thiab muaj qee yam khoom uas tshwj xeeb rau lawv. Raws li nws hloov tawm, lub teebyog electromagnetic nthwv dej thiab ua raws txhua txoj cai. Ob peb xyoos ua ntej Hertz, muaj ib tug txiv neej uas ua qauv qhia rau lub zej zog kev tshawb fawb tiam ntawm electromagnetic nthwv dej, tab sis vim hais tias nws tsis muaj zog nyob rau hauv txoj kev xav zoo li Hertz, nws tsis tuaj yeem ua pov thawj tias qhov kev ua tiav ntawm qhov kev sim yog. vim muaj tseeb rau oscillations.
Peb yog ib lub ntsiab lus me ntsis. Hauv seem tom ntej no, peb yuav saib cov piv txwv tseem ceeb ntawm lub sijhawm oscillations uas peb tuaj yeem ntsib hauv lub neej txhua hnub thiab hauv qhov xwm txheej.
Views
Cov xwm txheej no tshwm sim txhua qhov chaw thiab txhua lub sijhawm. Thiab dhau ntawm cov nthwv dej thiab kev sib hloov ntawm lub log uas twb tau hais los ua piv txwv, peb tuaj yeem pom qhov hloov pauv ntawm peb lub cev: kev cog lus ntawm lub plawv, kev txav ntawm lub ntsws, thiab lwm yam. Yog tias koj zoom rau hauv thiab txav mus rau cov khoom loj dua peb lub cev, koj tuaj yeem pom qhov hloov pauv hauv kev tshawb fawb xws li biology.
Ib qho piv txwv yog qhov hloov pauv raws sij hawm ntawm cov pej xeem. Lub ntsiab lus ntawm qhov tshwm sim no yog dab tsi? Nyob rau hauv txhua tus pej xeem, muaj ib txwm nce, ces ib tug txo. Thiab qhov no yog vim muaj ntau yam. Vim muaj qhov txwv tsis pub muaj thiab ntau lwm yam, cov pej xeem tsis tuaj yeem loj hlob mus ib txhis, yog li ntawd, nrog kev pab los ntawm natural mechanisms, xwm tau kawm kom txo tus lej. Nyob rau tib lub sijhawm, kev hloov pauv ntawm cov lej tshwm sim. Tib yam tshwm sim nrog tib neeg lub neej.
Tam sim no cia peb tham txog txoj kev xav ntawm lub tswv yim no thiab tshuaj xyuas qee cov qauv hais txog lub tswv yim xws li lub sijhawm oscillations.
Theory
Lub sijhawm hloov pauv yog lub ntsiab lus nthuav dav. Tab sis, raws li nyob rau hauv lwm yam, qhov ntxiv koj dhia dej - qhov ntau incomprehensible, tshiab thiab complex. Hauv kab lus no, peb yuav tsis nkag mus tob, tab sis tsuas yog piav qhia luv luv ntawm cov khoom tseem ceeb ntawm oscillations.
Cov yam ntxwv tseem ceeb ntawm lub sijhawm oscillations yog lub sijhawm thiab zaus ntawm oscillations. Lub sijhawm qhia tias nws yuav siv sijhawm ntev npaum li cas ntawm nthwv dej kom rov qab mus rau nws qhov qub. Qhov tseeb, qhov no yog lub sijhawm nws yuav siv nthwv dej mus rau qhov kev ncua deb ntawm nws cov crests uas nyob ib sab. Muaj lwm tus nqi uas zoo sib xws rau yav dhau los. Qhov no yog qhov zaus. Qhov zaus yog qhov hloov pauv ntawm lub sijhawm thiab muaj lub ntsiab lus ntawm lub cev hauv qab no: nws yog tus naj npawb ntawm nthwv dej crests uas tau dhau los ntawm qee qhov chaw ntawm qhov chaw hauv ib chav tsev ntawm lub sijhawm. Qhov zaus ntawm lub sij hawm oscillations, yog hais nyob rau hauv daim ntawv ua lej, muaj cov qauv: v=1 / T, qhov twg T yog lub sij hawm oscillation.
Ua ntej dhia mus rau qhov xaus, cia peb tham me ntsis txog qhov chaw uas muaj kev hloov pauv raws sijhawm thiab kev paub txog lawv yuav muaj txiaj ntsig hauv lub neej.
Daim ntawv thov
Peb twb tau txiav txim siab txog hom oscillations nyob rau saum toj no. Txawm hais tias koj raug coj los ntawm cov npe ntawm qhov chaw lawv ntsib, nws yooj yim to taub tias lawv nyob ib puag ncig peb txhua qhov chaw. Electromagnetic tsis yog tawm los ntawm tag nrho peb cov khoom siv hluav taws xob. Ntxiv mus, kev sib txuas lus hauv xov tooj lossis xov tooj cua yuav ua tsis tau yog tias tsis muaj lawv.
Suab nthwv dej kuj yog vibrations. Nyob rau hauv lub zog ntawm hluav taws xob voltage, ib tug tshwj xeeb daim nyias nyias nyob rau hauv tej lub suab generatorpib vibrate, tsim nthwv dej ntawm ib co zaus. Ua raws li daim nyias nyias, huab cua molecules pib vibrate, uas nws thiaj li ncav cuag peb pob ntseg thiab pom tau tias yog suab.
Zoo kawg
Physics yog ib qho kev tshawb fawb zoo heev. Thiab txawm hais tias nws zoo li koj paub txhua yam hauv nws uas tuaj yeem siv tau hauv lub neej txhua hnub, tseem muaj qhov zoo li no uas nws yuav pab tau kom nkag siab zoo dua. Peb cia siab tias tsab xov xwm no tau pab koj nkag siab lossis nco txog cov khoom siv ntawm lub cev ntawm kev co. Qhov no yog ib lub ntsiab lus tseem ceeb heev, kev siv tswv yim ntawm txoj kev xav uas tau pom nyob txhua qhov chaw niaj hnub no.
