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# q7_sol - l'Swt A J K= S.45(0 Rattq tuiz" Q€-9'30...

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Physics 133, 9:30 section, Autumn Z0l0 Recitation Instructor (circle one): Albert Dainton QUrZ #8 December 2.2010 h= 6.63 x lO-ra J s= 4.14 x l0-r5 eV s c = 3.00 x 108 m/s m " = 9 . l l x l 0 - 3 r k g e = 1.60 x l0-re C hf-<D=K,* AxAp*> ft t^; NL = r l) (2) t15 pointsl A beam of electrons passes through a double-srit with a srit spacing or tiodn, and forms aninterference pattern on a screen 1.5 ln awa)r. The spacing between int"..f"r.nJ. ,.ffirffii "y Whatistheenergyofthe.l".t,on,@,gy,t,o,t.ru"-inunit,ofeV.Thee|ectron'uy5-ffio non-relarivisticalty.) / s paelnq brfwecrt- unhl l"lny anl if"s ttrrl neiXh ho r i: nYvcrt Uy m = I J sin6 = r.n^ r = d S+ - ([email protected],ttir*.\ _ 6.67.1[or=e,67p 'A-;T
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Unformatted text preview: l'Swt A J K= S.45, (0-', Rattq tuiz\! ' *",. Q€-9'30- J"{ey Panon Schmidt Smith zizka 25 pointso 18 minutes fi= 1.05 x l0-3a J s = 6.5g x l0-16 eV s hc = 1240 eV nm m " c 2 = 5 l I k e V (l) u0 pointsl Light illuminates a metal surface with a :.+ Ty workfunction. Electrons are observed ;:Tji:ff,fil"l"'il?:"^Iji'+s pr" 7-0. ip:@hat is the *"""r""e,r, orthe risht? (rhe answer shourd be in units of nm.%u mayi;"uT*[email protected] 6;1"fi"#:;i;:;*"'"' r's '!rsnrr ( r ne K,nr: l^,vi* = t(qtt.tl-'iIJX7.0.t0'v; z /.23.tl-"J @ 2.73' tf'tJ " #,,, = l"31u,y Ey\,hn : g- + k*n, - j,leV + l.3le{ = Ll ,71eV X: l7f 0 ev'nkl 260 nm tl.7l eV F=T (6,e 3, lo'"J,J, = rufl 7Ll ooo€V...
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