广东海洋大学2009年科技英语期末考试试题A卷

广东海洋大学2009——课程号：□考查□B卷口开卷I总分阅卷教师各题分数实得分数Directions:Thereare5passageresonanceoccursasthewavcollisions,oritmaybere-emitted.Resonatingaoftheultravioletlightforquitealongtime(about100millionthsgivesupitsenergyasAtlowerwavefrequencies,likethoseofvisiblelight,electronsintheglassachanceofcollisionwithneighboringatoms,andenergyofvibratingelectronsisre-emittedaslight.ClearglassistransparInfraredwaves,withfrequencieslowerthanthoseofvisiblelight,vibratenotonlytheelectrons,butentireatomsormoleculesinthestructureoftheglass.Thisareoftencalledheatwaves.Glassistransparenttovisiblelight,butnott1.GlassisnottransparenttoultraB)Whenultravioletraysshineonglass,resonanceoccurmaintainsalargeamplitudeofvibrationoftheelectrons.C)ElectronsinglasshaveanaturalvibrationfrequencyinthD)Allofabove.A)RadiowavesB)InfraredlightC)VisiblelightA)Thefrequenciesofvisiblelightarelowerthanthoseofinfraredwaves.B)Thefrequenciesofultravioletarelowerthanthoseofvisiblelight.C)Thefrequenciesofinfraredwavesarelowerthanthoseofvisiblelight.D)Thefrequenciesofultravioletarelowerthanthoseofinfraredwaves.identicaltothefrequencyofthelightthatproducedthevibrationinthefirstplaA)There-emittedlighthasthedifferentfrequencyoftheincidentlight.B)There-emittedlighthasthesamefrequencyoftheiC)Thefrequencyofre-emittedlighthassomethingtodowD)Thefrequencyofre-emittedlighthasnothingtodowiththeincidentlight.fWehaveseenthatallthevisiblecolorsmixedenough,theperceptionofwhitealsoresultsfromtaddtoproducewhite.Whenttwoofthethreecolorsareadamountsofred,green,andblue,thecolorstowhicheachofosensitive,wecanproduceanycolorinthespectrum.Forthisreason,arecalledtheadditiAcloseexaminationofThemixturesofcombinationsofred,green,andblueatadistanceprovideacompletemorealightgraythanblilluminatedpartsofthescreen,weseethisgrayas6.WhatdoallthevisiblecolorslightmixedA)BlackB)WhiteC)Red7.Theword"perception"(LiA)Thesenseofhuman'seyeB)eyesightC)EyeD)LightB)Becausethelightsareaddedtogetherbeforetheobserve A)BlueB)GrayC)YellowD)MagentaA)CommixredandyellowliC)Commixredandbluelighttheflameinalldirections.Whentheseraydmirrorsinthistextffthenormalsatdifferentpointsonthesurfactheiranglesofincidence.A)ThelightraysdonotactuallycomefromthepositionoA)Thelawofreflectiondoesn'tholdwhenraysfromtheobjectencounteraflatmB)ThelawofreflectionstillholdswhenraysfromtheC)ThelawofreflectionholdsonlywhenraysfromtheobjectencounterA)NaturalB)TheperpendiculartothemirrorC)GenericD)TheparalleltothemirrorLEDsarebasedonthesemformoflight.Thiseffectiscalledelectroluminescenceandthecolorofthelightdeterminedbytheenergygapofthesemiconductor.compactsizeofLEDshasallowednewtextandeveloped,whiletheirhighswitchingrB)Whenp-njunctionisinvertedbiased.A)Becauseelectronsareabletorecombinewithholes.fexpensiveandrequiremoreprecisecurrentmanagement.expensiveandrequiremorepreciseheatmanagement.A)DifferentC)VariousA)LEDscanbeusedaslow-enerB)Alltraditionallightsourcescanbereplacedrepresentedincommercialproduction,accountingfor89.6%FirstGenerationtechnosignificantprogressinreducingapproachingthetheoreticallimitideposition,electroplating,anduseofUltrastechniquesevolveproductioncostswillbedominatedbyconstituentmaterialrequirements,Themostsuccessfulsecondgenerationmaterialshaveosts.Infgeneration(thin-filmtechB.atpresentthereislittleresearchintopresent.endevefD.manymanufacturingtechniqB.SecondgenerationtechnologieB.atpresent,thesecondgenerationsolarcellproductionrepresC.solar-cellarrayscannotprovidetheenoughpowerfortheoperatiD.productioncosthassomethingtodowithmanufacturingtechniqueshaveevolvA)sharpboundariesB)magneticfieldA)aretransparentofB)istransparentto29.LighttravelsthrouA)quicklyB)fastC)slowlyD)slowA)exceptB)includingC)reflectD)rethroughaprismandobservingtherainbow-coloredA)compositeofB)acomposedofC)acompositeofD)composeofA)blackB)whiteC)yelloA)exceptredB)exceptblueC)white34.WhentwocolorsareaddedtogethertoprA)additiveprimaryB)C)subtractiveprimaryD)mare-emittedlightisreturnediA)reflectionB)refractionC)reflectedD)refractedA)roughB)slowC)freeD)diffuse38.Thelawofrefraction,calledSnell'slaw,isn,sinO=n₂sinθ₂.A)quantitativeB)qualitativeC)definitionD)quantificationallyA)nearB)farC)nearer40.Theofalensisthelinejoiningthecentersofcurvaturesofitssurfaces.A)focalplaneB)radius41.Inthelens,anincidentbeamoflightparalleltotheprincipalaxisisnotofthelens.A)divergingB)concaveC)convexD)converging42.istheresultoflightofdifferentrefractionsinA)SphericalaberrationB)CompoundlensC)ChromaticaberrationD)PerfectimA)biggestB)smallC)smallestDcanberegardedasoverlappedcrestsoftinywaves.A)firstB)primary45.Theamountof_dependsonthewavelengthofthewavecomparedwiA)interferentB)diffractionC)diffractD)iA)inthephaseB)inphaseC)outofphaseD)outofthephaseA)NewtonringB)Newton'sringsC)Newtonrings48.AcontainsthewholemessageorentirepiD)stereoscopicmovieinmanyphasesofvibrationareemitted.A)coherentB)incoherentC)cohe50.Wespeakof