nagle_phys2170fa09_solutions_hw06

nagle_phys2170fa09_solutions_hw06 - LL YE(BM—5M T‘s...

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Unformatted text preview: LL, YE (BM—5M T‘s. ~90“ (Qt/L233»; ANW HQClsqu/x. (Kr \50 x {OGKM’T [05 1/0 "mg TN; = \350 w/W;2 : (350 \s Bat/m? {ASP 7. 9cm 3 4%»: X mm 3 W/oALBC 14 7T : igagx /Q 26; LUCA—K) Stu/$5 3 JV\ MC, Q ‘ mam»! . cur a) How PRWS V V I R2 “ T\ (om/N _-2 '1 7 wfim< it? pmms CVVFOfi-‘Q i #Pth /s K QCGD‘BCE ( "Fa—Kl » (Sr/0°”) x (QM/0'13“ l , L/Tr 051/0) f<§ Po: —~9;‘—+pt\ QM¢4xgwng E Eo +mecj' : E; + 1:, ’ Dc; +—Wk C2 : Vh‘c,~% §¥i§:{:;;;?P 2:: use (aim—I A?) W‘*—€— g“ c (HR, 3 QOLMMQCZ ' WC [(90— (V g 2 2 . Pc\ (9C %‘ '(I‘L\BC = (fl%flWEZ %W5fq U . (Hm) “RV/Arm E ’PC, [0/3 Sta/~43 on Q Ksm Ham/{C 4753ch (MéNBULI ad” ,_ T7072, wig-car cyst—fa; 0% (3m (nemva «- , lac /6lé'3A/‘0'§:‘3*/o§?\ 31W” ' 7x 3 - ’l ‘2 r— Efcvsby 9 X J ’ €M’5‘~\ __ ~= ¢( (0’3 (:5) (0-5”; ‘”‘/s‘Y-. ' \ ) M\ a” '5‘; @(‘AIZ ’FZ ‘7 VL> Jig“ V\ ‘ ,, (ll/Yew £er 0) (ob/401:6 M 5 [0%w W0 st . @éé . \(\: 2 /‘Q—| mm 0‘ 3 Ml WV“ ,5 H 91 W“ X 5 W44 mm c3 4 0/3. AM g D A) fl’790 :3 ,L a R 7\ a a 3 flak? VIM SERVES lad/1&8 MWAvD-‘efiv a w- m-qunhn*v“—1,o~MW-nwl~u—v¢—h<»-hI—-HA*'»MV<~— r 1 - 4~A . _‘ ..4 - n ' mm‘, M. a “W. ......‘ h. , . C d3 ((05% M ‘3 00 (Sea W€)¢+ Stag-A b 6A. In the PHeT simulation of the Photoelectric effect, sketch the results obtained using different metals. Explain why the different metals have different results. “we... ~~ . , , l- V: .- ghee: r .5:::...u;;.s 5.9 ' mare Expem'mr'la' Parameters Emerlmemal Paramme'S Experimental Parameters Experimental Parameters Experimental Parametere WWW wavg‘engm ’mer‘SW'V‘mage1 [Material 'Wavelengm IntenSW VUlIagE Materla’ [Wavelength ’lnteneity Voltage [Material Wavelength Intensity Voltage Material Wavelength Intensity Vo'tage 20w 850 "m [700% [000V Copper 850nm 100% 0.00V Platinum 850 nm 100% 0.00V Caluum 850 nm 100% 0.I]UV Grams Graphe clams Graphs Current vs baflert’voltage :J Current vs batteryvoltage _ Current vs battenrvoltage _] Currenlvs batten/voltage l ‘ L Currentvs battery voltage (“"me “9m ‘mensm’ fl Currentv-s light intenSiN Current vs light intensity ;] Current vs lightintensiw Current vs light intensity Electron Energy VS “gm frequency El Electron energVVS “gm "fluency ' Electron energy vs light frequency v] Electron energyvs light frequency Electron enequ vs llqht frequency EnerovfeV) Enernvlem Enerm‘revt Ene :ivfevt Enemvmw “00 0’5 “DANE 3U“ 000 075 1.50 325 300 003 . 000 0.75 150 225 3.00 150 225 3.00 “equeml’m” ‘5 HZ) Frequency (x1 0‘16 Hz) ' Freguenty (x1 0"1 5 Hz) By measuring the frequency when the current starts (i.e. electron ‘ ,7 energy > 0) one measures the I [ ICuf'eflle batten/voltage ‘1 different work functions. =—————. g ‘ M Heumn t-m-rgv vs ngmrrequem y File rlpumr: Help Sodium (i) = hf ~ 2.3 eV Zinc cl) = hf ~ 4.1 eV Copperq) = hf ~ 4.1 eV Platinum (1) = hf ~ 6.2 eV Calcium <1) = hf ~ 3.1 eV m ‘ 5” 22»; ~ “ rmquency m w 5 H2] The roughly measured values from the PhET simulation agrees reasonably with the Table of values shown in lecture. Aluminum 4.1 eV Cesium 2.1 Potassium Beryllium Cadmium Selenium Calcium Silver - 4.5 Sodium One could also (though not necessary) try to map out how deep the potential difference is between the least bound and most bound electrons by looking at the current versus frequency and seeing around when the current stops increasing. ...
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