穿越英文PPT.ppt 29页

Timetravel HerearethreepartswewilltalkaboutTimetravelinTVshowsandsciencefictionsDifferentattitudestowardsTimeTravelIsTimeTravelpossible? TimeTravelshowsThePalacewasoncepopularonHunanchannel,whichwasregardedasasummerblockbusterforhighaudiencerating. 步步惊心ZhangXiao,acontemporaryChineseyoungwomanfromthe21stcentury,accidentallytraveledbacktotheQingDynastyduringthereignoftheKangxiEmperorafterexperiencingadeadlytrafficaccident. TimetravelinsciencefictionsInmanyworksoffantasyandsciencefiction,thetimemachineisjustamagicalplotdevice.Noactualscienceisthrownattheaudience.Afterall,youareprobablynotwatchinglifeonmars(《火星生活》）orterminatorsalvation（《终极者：救世主》）foralessonintheoreticalphysics. Startrek（星际迷航）IfwelearnedanythingaboutthephysicsoftimeandspaceformRichardDonner‘1978filmSuperman,it‘sthatifyouflyaroundtheearthreallyfast,youcanreverseitsrotationandrollbacktime.Astoryaboutatimetouristnamed“Doctor”andhistimemachine“Tradis”DoctorWho(神秘博士)----byBBC AccordingtotheStarTrekWiki,50episodesofthesixseriesfeaturedtimetravel,asdidfourofthe11films.TheStarTrekuniverseisfulloffantasticideas:alienswithrippledforeheads,holodecksandmoretimethanyoucanshakeastickat. Astoryaboutatimetouristnamed“Doctor”andhistimemachine“Tradis”DoctorWho(神秘博士)----byBBCAccordingtotheStarTrekWiki,50episodesofthesixseriesfeaturedtimetravel,asdidfourofthe11films.TheStarTrekuniverseisfulloffantasticideas:alienswithrippledforeheads,holodecksandmoretimethanyoucanshakeastickat.Startrek（星际迷航）IfwelearnedanythingaboutthephysicsoftimeandspaceformRichardDonner‘1978filmSuperman,it‘sthatifyouflyaroundtheearthreallyfast,youcanreverseitsrotationandrollbacktime. DifferentattitudestowardsTimeTravel●MostTimeTraveldramasarebasedontruehistoryandtheelementsaddedtothestoriesmakehistorymoreinterestingandattractive.●WhileothersarguethatTimeTraveldramastendtodistorthistory,whichmakesthehistoryaconfusion,especiallyabouttheYongzhengEmperor.SupportAgainst ●TimeTraveldramasprovidegreatentertainmenttoaudience.Sotheyarepopularamongteenagersandhousewives.DifferentattitudestowardsTimeTravel●TimeTraveldramasarereallyridiculousandtheyareareflectionofstodgyculture.supportagainst DifferentattitudestowardsTimeTravel●TimeTravelshowsarefulloffantasticideas,whichexpressagreatdesiretoexplorethepasttime.AlthoughTimeTravelhasn’tbeenachievedinreallife,lotsofpeoplearestilladdictedtoit.●TimeTravelalwaysmisleadsteenagersintodreamingaboutsomethingimpossibleandlivinginadummyworld,whichhasabadeffectontheirdailylife.Supportagainst ●“Producersandwritersaretreatingserioushistoryinafrivolousway,whichshouldbynomeansbeencouragedanymore.”AccordingtoLiJingsheng,thedirectorofTheStateAdministrationofRadioFilmandTelevision. Thisistheplacewherethetwostudentsendedtheirlives. Thisistheplacewherethetwostudentsendedtheirlives.●ConsideringthatthenegativeeffectsofTimeTravelSeriesoverweighpositiveones,theStateAdministrationofRadioFilmandTelevisionhasbannedTimetravelseries. HowtotreatTimeTravelSeries●WeshouldbalancetheadvantagesanddisadvantagesofTimeTravelSeries.●Ononehand,watchingtimetravelseriesissurelyagoodwaytohaveentertainmentduringthefreetimeandthefantasticstoriescanstimulateourimagination.●Ontheotherhand,weshouldn’tregardtheTVshowsasrealhistoryorrelatethecharactersindramastohistoricalfigures.Inshort,weshoulddevelopacorrectjudgmentaboutwhat’swrongandwhat’sright. IsTimeTravelpossibleFromsummerblockbusterstosensationalscienceheadlines,moderncultureisconstantlyinundatedwithtalesofTimeTravel.？Butwhenyouboildownthephysicsinvolved,isitpossibletotravelthroughtime? ThereisnodoubtthatAlbertEinsteinisoneofthemostauthoritativeonestoanswerthisquestion.Accordingtohistheoryofrelativity,speedandmassaretwomajorfactorsaffecttime. ◇FactorⅠ:speedAphenomenoncalledtimedilation(时间膨胀效应)isthekeyhere.Timepassesmoreslowlythecloseryouapproachthespeedoflight----anunbreakablecosmicspeedlimit. ◇FactorⅠ:speedAssuch,thehandsofaclockinaspeedingtrainwouldmovemoreslowlythanthoseinastationaryclock.Thedifferencewouldnotbehumanlynoticeable,butwhenthetrainispulledbackintothestation,thetwoclockswouldbeoffbybillionthsofasecond.Ifsuchatrainwouldattained99.9%lightspeed,onlyoneyearwouldpassonboardforevery223yearsbackthetrainstation. ◇FactorⅡ:massSpeedisn’ttheonlyfactorthataffecttime.Onmuchasmallerscale,massalsoinfluencetime.Timeslowsdownthecloseryouaretothecenterofamassiveobject.Forexample,aclockaboardanorbitingsatelliteexperiencetimedilationduetoboththespeedofitsorbitanditsgreaterdistancefromcenterofearth’sgravity. AccordingtoEinstein’stheory,TimeTravelispossibletheoretically,butitcannotbeachievedintherealworld.Therearesomeotherevidencesforhisopinion.wormhole AboutWormhole(虫洞）Wormholeisalittlebitlikeatunnelorshortcutbetweentwodistantpoints.Forexample,ifyouhadawormholehereinyourroomandyoujumpedthroughityouwouldn’tcomeoutonthestreet,you‘dmaybecomeoutontheothersideofthegalaxy.World-famousphysicistStephenHawkinghasproposedthatwormholeoccurringataquantumlevel(量子能级)couldtheoreticallyprovideafootholdfortimetravel. SomepeopleholddifferentviewsForexample,imaginggoingbackintimeandyourkillyourownmother.Thenshe’dnevergivebirthtoyou,andjusthowwouldyouhavebeenabletotravelbackintimetocommitmatricideinthefirstplace? AnumberofquestionsaboutTimeTravelremainunanswered.Willtimetouristsformthefutureevershowuptohelpusout?Wewilljusthavetowaitandsee.?? thankyou