emission spectradocx发射spectradocx

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1、ObservationsofEmissionSpectraPrimaryPurpose:TodetermineRydberg’sconstant.SecondaryPurposes:CompareHeliumspectrumwiththatofHydrogen.Determine2plevelsplittinginHelium.DeterminewavelengthofbrightestlinesinMercuryandSodiumspectraanddeterminewhichenergyleveltransi

2、tionsproducedtheselines.Observevariousemissionspectra.Warnings:Donotpointfiberopticsprobeatverybrightsources.Keepblueplasticcoveronprobewhennotinuse.Donotpointfiberopticsprobedirectlyatlaser.Spectrumtubeswillbehot.Turnoffpowerandusehandkerchieforwashragtohold

3、tubewhenremovingtube.NotetoInstructor:ThisexperimentrequiresacomputerthathastheRedTidespectrometersoftwareinstalled.Ifnotalreadydone,softwaremustbeinstalledbeforeattachinghardware.ProcedureSetup1.ConnectthefiberopticscabletotheRedTideSpectrometer.Connectspect

4、rometertocomputer.Turnoncomputerandlogin.IfthecomputerisnotontheAuburndomainusethePhysicsLabUseraccount.Ifyoudonotknowthepasswordforthisaccount,seethelabadministrator.2.StarttheSpectraSuitesoftware.ApictureoftheRedTidespectrometershouldbeontheleftsideandaredl

5、inerunningacrossthegraphareawithprobecoveroff.TakeData3.PutaHydrogentubeinthepowersupplyclips.Putpowersupplyvertically.Usingarodandclampsplacetheendofthefiberopticcableabout6inchesfromthespectrumtube.Youmaywanttoturnofftheroomlightsorplaceaboxaroundthetubeand

6、fiberopticcabletolimitroomlight.Someofthelinesareweak.Turnontubepowersupplyandadjustprobepositionsohighestpeakisneartopofgrapharea.Getthewavelengthsofthetallestpeaksbyputtingmouseonthepeakandclicking.Thewavelengthinnanometersisinaboxalongthebottomofthedisplay

7、.Adjustthepositionoftheprobesoyouhavewavelengthsfor4strongestlinesinthevisiblepartofthespectrum.Printthespectrum.4.IftheHydrogentubeisnewtherewillbe2linesintheinfraredregionbetween700-900nm.RecordwavelengthsanduseInternettoidentify.Ifthelinesarenotpresentskip

8、thisstep.1.TurnoffthepowersupplyandreplacetheHydrogentube(tubewillbehot)withaHeliumtube.Observeandprintthespectrum.Adjusttheprobepositionsasneededtoobtainwavelengthofatleast10linesbetween