Cov txheej txheem:
- Kev sib raug zoo ntawm kev txwv tsis pub muaj peev xwm thiab wavelength yog dab tsi?
- Thaum lub teeb ntawm wavelength lambda tshwm sim ntawm cov hlau nto qhov chaw nres tsheb?
- Thaum qhov xwm txheej wavelengths yog Lambda thiab Lambda 2 lub zog kinetic?
- Lub cim ntawm kev tso tseg muaj peev xwm yog dab tsi?
Video: Thaum qhov xwm txheej wavelength yog lambda txwv tsis pub muaj peev xwm?
2024 Tus sau: Fiona Howard | [email protected]. Kawg hloov kho: 2024-01-10 06:38
Thaum qhov xwm txheej wavelength yog lamda, nres muaj peev xwm yog 3V_0.
Kev sib raug zoo ntawm kev txwv tsis pub muaj peev xwm thiab wavelength yog dab tsi?
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.
Thaum lub teeb ntawm wavelength lambda tshwm sim ntawm cov hlau nto qhov chaw nres tsheb?
Thaum lub teeb ntawm wavelength lambda tshwm sim rau ntawm qhov chaw hlau, txwv tsis pub muaj peev xwm pom tias yog x. Thaum lub teeb ntawm wavelength nlambda tshwm sim ntawm tib qhov chaw hlau, txwv tsis pub muaj peev xwm pom tau tias yog (x) / (n + 1).
Thaum qhov xwm txheej wavelengths yog Lambda thiab Lambda 2 lub zog kinetic?
Lub KE ntawm photoelectrons yog E thaum qhov xwm txheej wavelength yog (lamda) / (2). Tus KE yuav 2E thaum qhov xwm txheej wavelength yog (lamda)/(3).
Lub cim ntawm kev tso tseg muaj peev xwm yog dab tsi?
Kev txwv tsis pub muaj peev xwm yog qhov txiaj ntsig ntawm kev rov qab muaj peev xwm sib txawv ntawm ob daim phiaj uas tsuas yog txaus los nres lub zog tshaj plaws photoelectrons tawm. It is denoted by " Vo ".
Pom zoo:
Puas yog qhov muaj peev xwm muab qhab nia suav tias yog tag nrho lossis tsis muaj?
Cov peev txheej tau qhab nia yog cov kev hloov pauv hauv cov peev txheej membrane uas sib txawv ntawm qhov loj me, tsis yog tag nrho-lossis - tsis muaj . Puas yog qhov muaj peev xwm muab qhab nia suav tias yog tag nrho lossis tsis muaj lus nug?
Nyob hauv kev muaj peev xwm lossis muaj peev xwm?
Tsis muaj lo lus hability. Muaj peev xwm muaj kev paub, kev txawj ua ib yam dab tsi. Lo lus ze tshaj plaws rau kev noj qab haus huv yuav yog qhov qub, tab sis ib txwm peb tsuas yog hais tias nws nyob tau lossis nyob tsis tau. Feem ntau yog xa mus rau ib puag ncig lossis tsev .
Thaum pib qhov hluav taws xob qhov chaw muaj peev xwm yog?
Kev piav qhia: Thaum lub peev xwm ntog mus txog -fermi peev xwm, qhov kev hloov pauv ntawm qhov chaw tshwm sim. Lub rooj vag voltage uas coj cov kev hloov pauv no hu ua qhov pib voltage. Kev piav qhia: Nto inversion tshwm sim thaum lub rooj vag voltage sib npaug rau qhov pib voltage .
Puas muaj qhov tsis muaj xwm txheej tsawg?
Cynics tau lees tias qhov kev nce siab tau raug tsav los ntawm kev lag luam rog, nrog cov tsev kawm ntawv nrhiav kom paub meej qhov chaw ua ntej tom qab-A-Level tshem tawm nrawm. Tab sis Cathy Gilbert ntawm Birmingham tau taw qhia tias tsis muaj kev lees paub tseem tsis tshua muaj, ntxiv, "
Rau qhov xwm txheej ua rau tus neeg ua haujlwm tsis muaj peev xwm tshaj xya hnub?
Ntau tshaj xya-hnub tsis muaj peev xwm ntawm tus neeg ua haujlwm Cov xwm txheej yuav tsum tau tshaj tawm qhov uas lawv ua rau tus neeg ua haujlwm lossis tus neeg ua haujlwm tus kheej nyob deb ntawm kev ua haujlwm, lossis tsis tuaj yeem ua lawv txoj haujlwm ib txwm ua, ntau tshaj xya lub sijhawmhnub vim lawv raug mob.
