3Dcomeshome
Haveyouhadthisexperience?Youarewatchingamovie.Amanisshootingonthescreen.Thepictureissorealthatyouthinkheisshootingatyou.Oracarisspeedingonthescreenandatonepointyouareafraiditwillhityou.
Three-dimensional(3D)filmsusespecialtechnologytomakepicturesseemmorerealandexcitingthantwo-dimensionalones.TwopopularmoviesinthecinemathisyearUPandIceAge;DawnoftheDinosaursbothuse3Dtechnology.
Sofarwecanonlysee3Dfilmsinthecinemawithaspecialscreenandprojector.Butsoonwewillbeabletowatchtheminourlivingrooms.LastmonththeJapanesecompanySonytoldreportersthatitplanstobring3Dtelevisionstohomesin2010.Thecompanyisalsohopingtomakeotherproductswith3DlikelaptopsandPS3.
“ The3Dtrainisonthetrackandwearereadytodriveithome”saidSonyPresidentSirHowardStringer.
How3Dtechnologyworks
ThreedimensionalmoviesandTVprogramsarefuntowatchbutdoyouknowhowtheyaremade?Itismucheasiertounderstandifwedoanexperiment.
Holdoneofyourfingersupatarmslengthandcloseoneeye.Thentryclosingtheothereye.Asyouswitchbetweenopeneyesyoushouldseeyourfinger“jumping”leftandrightagainstthebackground.
Thishappensbecauseourtwoeyesareabout4cmawayfromeachother.Theseparationcauseseacheyetoseetheworldfromadifferentangle.Thebrainputsthesetwoviewstogether.Whatyouseebecomesthree-dimensional.
Threedimensionalmoviesaremadeusingtwovideocamerasatthesametimewhichcreatestwodifferentimages.Whenthemovieplaysinacinematwoprojectorsputthetwoimagesonthescreen.Withapairof3Dglassesthetwoimagesareseparatedandeachimageonlyentersoneeye.Yourbrainputsthetwopicturesbacktogetherandthepicturesonthescreenbecomethree-dimensional.
72.Whatdoesthesentence“The3Dtrainisonthetrackandwearereadytodriveithome”mean? .
A.They’vegotatraintotake3Dfilmsbackhome
B.Theyarereadytobring3Dtechnologytohomes
C.Theyhavenomoreworktodoon3Dtechnology
D.Theyarenotsureaboutthefutureof3Dfilms
73.Accordingtothetext3Dfilms .