Video: Kev kawm ntawm lub teeb yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Cov kev kawm ntawm lub teeb , hu ua optics, yog qhov chaw tshawb fawb tseem ceeb hauv physics niaj hnub no. Thaum twg teeb hits ib yam khoom opaque nws tsim duab ntxoov ntxoo. Teeb yog electromagnetic hluav taws xob uas qhia cov khoom ntawm ob lub nthwv dej thiab hais. Teeb muaj nyob rau hauv lub zog me me pob ntawv hu ua photons.
Xav txog qhov no, txoj kev kawm ntawm lub teeb hu ua dab tsi?
Optics yog qhov kev kawm ntawm lub teeb . Optics, ib ntu ntawm physics, ntsuas thiab txheeb xyuas cov khoom thiab tus cwj pwm ntawm teeb . Polarization, diffraction thiab cuam tshuam yog kawm hauv optics. Reflection thiab refraction ntawm teeb siv cov iav, optical fibers thiab lo ntsiab muag tau kawm thiab.
Tsis tas li ntawd, lub ntsiab lus ntawm lub teeb hauv kev tshawb fawb yog dab tsi? Teeb yog electromagnetic tawg nyob rau hauv ib feem ntawm lub electromagnetic spectrum. Lo lus feem ntau yog hais txog pom teeb , uas yog qhov pom spectrum uas pom ntawm tib neeg lub qhov muag thiab yog lub luag haujlwm rau kev nkag siab ntawm qhov pom.
Kuj Paub, qhov kev kawm ntawm lub teeb thiab nws cov khoom yog dab tsi?
Optics. Cov kev kawm ntawm lub teeb thiab kev sib cuam tshuam ntawm teeb thiab qhov teeb meem yog hu ua optics. Kev soj ntsuam thiab kawm ntawm optical phenomena xws li zaj sawv thiab lub aurora borealis muaj ntau yam qhia txog qhov xwm ntawm teeb.
Dab tsi yog 7 lub zog ntawm lub teeb?
Lub yoj qauv ntawm teeb yog illustrated los ntawm khoom ntawm kev xav, refraction, diffraction, cuam tshuam, thiab polarization.
Pom zoo:
Dab tsi yog lub tswv yim ntawm kev txhawb nqa ntawm kev sib cais ntawm kev sib deev?
Kev txhawb zog yog cov txheej txheem los ntawm kev xaiv ntuj tsim kom muaj kev sib cais ntawm kev sib deev. Kev txhawb zog tuaj yeem tshwm sim raws li hauv qab no: Thaum ob pawg neeg uas tau khaws cia sib nrug, rov qab los rau hauv kev sib cuag, qhov kev sib cais ntawm cov menyuam yaus yuav ua tiav lossis tsis tiav. Yog tias nws ua tiav, speciation tau tshwm sim
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)
Lub luag haujlwm tseem ceeb ntawm lub teeb pom kev ntawm photosynthesis yog dab tsi?
Lub luag haujlwm tag nrho ntawm cov tshuaj tiv thaiv lub teeb, thawj theem ntawm photosynthesis, yog hloov lub hnub ci zog rau hauv cov tshuaj siv hluav taws xob nyob rau hauv daim ntawv ntawm NADPH thiab ATP, uas yog siv nyob rau hauv lub teeb-yooj yim tshuaj tiv thaiv thiab roj sib sau ua ke ntawm qab zib molecules
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
Kev sib raug zoo ntawm lub teeb thiab teeb meem yog dab tsi?
Lub teeb thiab teeb meem cuam tshuam rau ib leeg hauv ntau txoj hauv kev. Kev sib cuam tshuam ntawm lub teeb thiab teeb meem txiav txim siab qhov tshwm sim ntawm txhua yam nyob ib puag ncig peb. Lub teeb cuam tshuam nrog cov teeb meem xws li emission thiab nqus. Cov nyhuv photoelectric yog ib qho piv txwv ntawm qhov teeb meem absorbs lub teeb