PHYS 210L Lab Report, Fall 2017

Date: 49-3 -S0\F AULD hysics Department 9.0 MAR 2017 Physics210L Interference & Diffraction Name: ‘Dene Yehua = Tsraa orcad Partner’s Name: _ Alc )A BAI] Section number: Instructor: Hoo, Pomad? I. Diffraction: Distance from slit to screen: L= __O- $m. ; \ \ - ~= Locations of Intensity Minima h Slit width a =0.04 mm Order Left of Right of Average = % (xr-xL) | Wavelength 4 (nm) central central maximum | maximum _ m=) =0.0l4 a.o\4 Q.OlY¢ 6 > 3 m=2 |ap 09 0.02% 0-022 € 5 8 m=3_ | -9,049 | -G-043 O-OU’S & 644 Slit width a =0.08 mm Order Left of Right of Average = 2 (xr-xL) | Wavelength A (nm) central central maximum | maximum = mal £7,4'5 1193 | <.d32 00> 66435 vio” 6 247! m=2_ 40.014 0.0% Q- Olu & SRE m =3 v102r\ o.92\ © OI C OSL Slit width a =0.16 mm Order Left of Right of Average = %(xr-xL) | Wavelength A (nm) central central ‘ maximum | maximum mal F8BoSxlo>| 2,54 9x107 a a7 HGH m =2 F665 x0" é372x0 | &. pol Vo * a m=3 {O00} 0.0 \ O.0l CAFO! a. Estimate the average value of A (show a sample calculation) and its rms error. Compare to the literature value of the wavelength of laser and comment. > Dm Fol nw our Valve 15.1 A he lormain Campue (6x4 ) CG 54 an Aherefwe aur resol are Lo aarcvrd ‘ Scanned by CamScanner b. Describe qualitatively what you would see if you use a white light instead ofa laser. C1 ¢ t , tC. ° SOON. wie Wate Ligitk LH nok eee) 4 cod 3 Sokol UWsoure Srey ; . | YON Jinn Jo Tol > we wid see OG siren fa) . , ., | mrt re SOPROLS I co c. Based on your observations, what happens to the diffraction pattern as the aperture becomes larger. rf fraction mothan loecmmes smal iN . , DO. x. mal Lo a Scanned by CamScanner - II. Interference: Distance from slit to screen: L= 005 m. Separations between Adjacent Bright Fringes Slit width a =0.04 mm, slit separation d=0.5 mm Fringe Length # of Y= distance between | Wavelength A (nm) Order ring maxima adjacent bright fringes Central D:DQA a5 16 xt 5 682.4 1* order 7a5 \ 9 Verte d 335, right zs asxtorF | 735 1* order : \9 SC IRR c#° ome] | fr 25 ) tat 5 a O35] 735.2 Slit width a =0.04 mm, slit separation d=0.25 mm Fringe Length # of Y= distance between | Wavelength 4 (nm) Order maxima adjacent bright fringes Central_ | 9.232 45 ANSI 626.5 1 order rly right 0,913 6 ad 635.3 I“ order | 9 -2 an 101% & D1bx lO 645.3 Slit width a =0.08 mm, slit separation d=0.25 mm Fringe Length # of Y= distance between | Wavelength \ (nm) Order maxima adjacent bright fringes Central DOS | Qa lu Ylo-F 6294 st va {6654x197 > AIO? | ESA 1 order 3 —% 07.6 left 6 Xxt0 23 Q.066 KO 6 2 Slit width a =0.08 mm, slit separation d=0.5 mm Fringe Length # of Y= distance between | Wavelength 4 (nm) Order maxima adjacent bright fringes Central | 0. OVW 1% og MIS | 133.5 1 order 2 3 right |? d2x0 a + 10697 x10 £99,2 I" order Ty = = left [HAP no + W06Fh xlo7> C274 Estimate the wavelength of the laser and its rms error. Compare to the literature value and comment. a) Xe 7 > 5 X= Xo f A aya a DX = £59.5195 am ae j K= NN = 1D. 2B nm n- (653 hal 12) n™ } Jina 3 - | A-60 2 (653-12, (Ser12) 4 Le Azborm (CHI, 66S) Then, the cegulty are acearalt Scanned by CamScanner { Questions 1. Explain how the slit width affects the value of XY? Xe AL X doesnt ade pend on the widlfh so. the cht width doesnt allt te a Volme oO tC x (~ 2. According to your results does the distance between maxima increase, decrease or stay the same when the slit separation is increased? Wen the set seperavo~ is in ceased , the dislanie v bebween maxima deorcase | 3. By what percentage, would the separation between two adjacent fringes change if the experiment is performed using an Ar*-laser emitting at 5] 14 nm? on = th~ aad “upen Lo Ao oc Sly Po Gin WY Sto 650 fe Sue the seperation wold ; ; 7 I Qh lt/ WIM Seep 29 6 Yee X age - Yee i Scanned by CamScanner