General Physics - Solved Exam 3 | PHYS 116, Exams of Physics

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In this and previous problem, please uritc nedtly a i d shuw all your wurk. No cruclii just

for a n u s ~ x r i c n lnrwuer without showing Iim-you got it.

PI-oblrm 2 ( 2 5 points). I .ighr wilh E. = GDI) rlm strikes at nurma! il~cidcncen two-slit

system as show11 in the sketch below. The separalion betwecr~lhe slits i s d - 2500 nm. tor pacts (a), {b), and (c) ignore the sli~swidth (,W), assuming thal they are "idcul" and raitiatc unjti~rmlyin qll di~ections. (^) I

(a) ( 5 points) Calculate I-row mar,y "nrdcrs" (interfescnce maxima) art. possi hle belween

(,h) (6 points) Calculate t h e clistance y~ - y,, between tho third interfercnci: maxirnum and

the cetitcr of the scrccn (central rllaxinlum

+ w q 3 s ( ~ B = $ x - ~ , 0.720 c-e-y -

2 - @, Y6.l

(c) ( 6 points) \Inkc a qualira~ivcg a p h of i~ltcrisi~y1:s. m g l c nl \be screen

pntlcrn missing'! Explain a d make a hfery qualitative graph c?f what the intztisi~y vs.

angle at th screen sl~oulclnow look li kc.

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I: la 3 *E - L i -y~(\l\i* l w k c L ~ ~ ~

GK, % ) 11 - 3 -i~kr+= -

50 6 b~=3 h e * - ;, a , G r

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