Thaum lub teeb tawm tsam cov ntaub ntawv, nws tuaj yeem tso cov hluav taws xob tawm ntawm lawv. Qhov no yog hu ua cov nyhuv photoelectric, txhais tau hais tias lub teeb (duab) tsim hluav taws xob. … Qhov hluav taws xob uas nres cov electrons kom tsis txhob ncav cuag cov hlau sib npaug lub zog hauv eV Piv txwv li, yog -3.00 V NW nyuam qhuav nres cov electrons, lawv lub zog yog 3.00 eV.
Cov mis rau cov nyhuv photoelectric yog dab tsi?
Cov nyhuv photoelectric yog txheej txheem uas EM hluav taws xob ejects electrons los ntawm cov khoom. Einstein tau hais kom photons los ua quanta ntawm EM hluav taws xob muaj zog E=hf, qhov twg f yog qhov zaus ntawm cov hluav taws xob.
V nres hauv cov nyhuv photoelectric yog dab tsi?
Qhov nres qhov hluav taws xob (lossis qhov muaj peev xwm nres) yog hais txog rau qhov sib txawv ntawm qhov yuav tsum tau txwv tsis pub electrons txav ntawm daim hlau thiab tsim kom muaj qhov tam sim no hauv kev sim photoelectric.… Qhov tsawg kawg nkaus ntawm lub zog uas yuav tsum tau tshem tawm ib qho hluav taws xob los ntawm cov hlau nto yog hu ua kev ua haujlwm.
Vim li cas voltage cuam tshuam rau photoelectric?
Kev nce qhov hluav taws xob ua rau muaj zog ntau dua electrons rov qab mus txog thaum kawg tsis muaj leej twg tuaj yeem tawm ntawm cov hlau thiab lub microammeter nyeem xoom. … Nws yog ib qho kev ntsuas ntawm lub siab tshaj plaws kinetic zog ntawm cov electrons emitted los ntawm cov nyhuv photoelectric.
Yuav ua li cas yog tus qauv rau kev txwv tsis pub muaj peev xwm?
Given: Stopping potential= Vs=2 V , wavelength of events light=λ=2000 Å=2000 x 10 -10 m, ceev lub teeb=c=3 x 10 8 m/s, Planck's tas li=h=6.63 x 10-34 Js, Charge on electron=e=1.6 x 10- 19 C.
