Video: Qhov ceev ntawm lub teeb zaus yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
wavelength = ceev ntawm lub teeb / zaus Luas = 3 x 108 m/s 1.06 x 108 Hz = 3 meters - txog 10 feet.
Ib yam li ntawd, tib neeg nug, lub teeb zaus yog dab tsi?
Cov zaus yog tus naj npawb ntawm nthwv dej uas dhau ib qho chaw hauv qhov chaw thaum lub sijhawm ib ntus, feem ntau yog ib thib ob. Peb ntsuas nws nyob rau hauv units ntawm cycles (yoj) ib ob, los yog hertz. Cov zaus ntawm pom teeb yog hu ua xim, thiab thaj tsam ntawm 430 trillion hertz, pom li liab, mus rau 750 trillion hertz, pom li violet.
Ib yam li ntawd, puas yog qhov ceev? Kev sib raug zoo ntawm cov ceev ntawm suab, nws zaus , thiab wavelength yog tib yam li rau tag nrho cov nthwv dej: vw = f hl, vw yog cov ceev ntawm suab, f yog nws zaus , thiab λ yog nws lub wavelength.
Ib yam li ntawd, koj tuaj yeem nug, qhov kev sib raug zoo ntawm kev ceev thiab zaus yog dab tsi?
Wave ceev yog qhov kev ncua deb ntawm nthwv dej mus rau hauv ib lub sijhawm, xws li tus lej ntawm metres nws mus rau ib pliag. Wave ceev muaj feem xyuam rau wavelength thiab wavelength zaus los ntawm kev sib npaug: Ceev = Wavelength x Ntau zaus . Qhov kev sib npaug no tuaj yeem siv los xam cov nthwv dej ceev thaum wavelength thiab zaus paub.
Muaj pes tsawg Mach qhov ceev ntawm lub teeb?
Piv txwv tias nws yog huab cua hauv hiav txwv, qhov ceev ntawm lub suab yog 1225 kph, thiab lub ceev ntawm lub teeb yog 299,709k. Qhov no ua rau cov ceev ntawm lub teeb Mach 880, 777.
Pom zoo:
Dab tsi yog kev sib raug zoo ntawm wavelength zaus thiab qhov ceev ntawm lub teeb?
Lub wavelength thiab zaus ntawm lub teeb yog ze ze. Qhov siab dua qhov zaus, qhov luv dua lub wavelength. Vim tias txhua lub teeb tsis txav mus los ntawm lub tshuab nqus tsev ntawm tib lub nrawm, tus naj npawb ntawm nthwv dej crests dhau los ntawm ib qho taw tes hauv ib thib ob nyob ntawm qhov wavelength
Dab tsi yog qhov txawv ntawm wavelength ntawm lub teeb liab thiab lub teeb violet?
Violet lub teeb yog hluav taws xob hluav taws xob hluav taws xob nrog wavelengths ntawm 410 nanometers thiab lub teeb liab muaj awavelength ntawm 680 nanometers. Qhov ntau ntawm wavelengths (400 - 700 nm) ntawm lub teeb pom kev yog nyob nruab nrab ntawm lub electromagnetic spectrum (Fig.1)
Dab tsi yog qhov flux los ntawm lub voos xwmfab ntawm sab yog tias tus nqi ntawm Q yog ntawm ib qho ntawm nws lub ces kaum?
Raws li peb paub tias, tag nrho cov flux los ntawm tus nqi q yog q / ε 0 (Gauss txoj cai). Yog hais tias tus nqi yog nyob rau ntawm lub ces kaum ntawm lub voos xwmfab, ib co ntawm cov flux nkag mus rau hauv lub voos xwmfab thiab tawm los ntawm ib co ntawm nws lub ntsej muag. Tab sis qee qhov flux tsis nkag mus rau hauv lub voos xwmfab. Qhov 1/8th no yuav muab faib ua 3 ntu dua
Dab tsi yog qhov txawv ntawm instantaneous thiab nruab nrab ceev dab tsi yog qhov piv txwv loj tshaj ntawm kev ceev ceev?
Qhov nruab nrab ceev yog qhov ceev nruab nrab ntawm lub sijhawm. Instantaneous ceev yuav yog qhov ceev txhua qhov muab tam sim ntawd hauv lub sijhawm ntawd, ntsuas nrog lub ntsuas ntsuas lub sijhawm
Dab tsi yog qhov zaus ntawm lub teeb liab?
Frequency yog tus naj npawb ntawm qhov tshwm sim ntawm qhov tshwm sim ntawm ib lub sijhawm. Zaus yog ib qho tseem ceeb parameter siv nyob rau hauv science thiab engineering los qhia tus nqi ntawm oscillatory thiab vibratory phenomena, xws li mechanical vibrations, suab signals (suab), xov tooj cua tsis, thiab lub teeb