When a metal surface, in a photoelectric effect apparatus, is illuminated with light at2 = 289.5 nm , the maximum kinetic energy of the photoelectrons produced isK9.31.95 еV .maxWhat is the work function, W , of the metal surface?If this photocathode is illuminated by light with a wavelength 2 = 457.0 nm , what stoppingа.b.voltage (absolute value), Vtois needed to stop all of the photoelectrons from reaching thestopcollector?What is the critical wavelength 1,? Light with any wavelength longer than 1 cannotС.produce any photoelectrons. Waves in general:FORMULA PAGE 1a y1-dimensional wave equation:1 a'y; here v is the speed of the wavev? ôt?Solution: f(x- vt) or f(x+vt)Harmonic or sinusoidal waves: y(x,t)= Asin(kx- ot)2лk2n= 27f; v=-Tv = f2General Constants:-34h = 6.626×10*J.s = 4.13567×10¬eV ·s ; (with recent revisions to the SI system ofunits Planck's Constant is defined to have an exact value: h= 6.62607015×10¯“J·s)–34-19hc = 1240 eV · nm; hc=1239.84eV · nm (for more accuracy); leV =1.6022×10-J= 299,792, 458 m /s (exact);-31electron mass: m, =9.1094×10' kgproton mass: m,=1.6726×10-27 kgPhotons: E = hfhc; Protons: m,c² = 938.3MEV , Electrons: m.c² = 511.0keV%3|h= 1.0546x10 34J•s = 6.5821×10-1eV ·sChapter 36. DiffractionSingle slit diffraction:Minima:a sin 0, = ma, m=1,2,3,...where a is the slit width, note: there is a maximum at0 = 0sin(a)паIntensity:I(0) = ,,a =-sin(0)maCircular aperture: First minimum: sin 0 = 1.22-Rayleigh's criterion ( 1

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What is the work function, W , of the metal surface? If this photocathode is illuminated by light with a wavelength 1 = 457.0 nm , what stopping а. b. voltage (absolute value), VHop , is needed to stop all of the photoelectrons from reaching the collector? What is the critical wavelength 1,? Light with any wavelength longer than 1 cannot С. produce any photoelectrons.

What is the work function, W , of the metal surface? If this photocathode is illuminated by light with a wavelength 1 = 457.0 nm , what stopping а. b. voltage (absolute value), VHop , is needed to stop all of the photoelectrons from reaching the collector? What is the critical wavelength 1,? Light with any wavelength longer than 1 cannot С. produce any photoelectrons.

University Physics Volume 3

17th Edition

ISBN:9781938168185

Author:William Moebs, Jeff Sanny

Publisher:William Moebs, Jeff Sanny

Chapter6: Photons And Matter Waves

Section: Chapter Questions

Problem 71P: A 600-nm light falls on a photoelectric surface and electrons with the maximum kinetic energy of...

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