求介绍著名科学家的英文简介,最好150字以内?急………………
求介绍著名科学家的英文简介,最好150字以内?
急………………
求介绍著名科学家的英文简介,最好150字以内?急………………
求介绍著名科学家的英文简介,最好150字以内?
急………………
ThomasAlvaEdison(1847-1931)
InventorThomasAlvaEdisonprofoundlyinfluencedmodernlifethroughinventionssuchastheincandescentlightbulb,thephonograph,andthemotionpicturecamera.Duringhislifetime,heacquired1,093patents,andmarketedmanyofhisinventionstothepublic.
AbriefbiographyofEdisonisfeaturedhere,alongwitharticlesfromjournalsofhisdayinwhichheofferedhisviewsonmusic,films,inventions,andothertopics.Famousforhismotionpictureandrecordedsoundinventions,Edisonhimselfappearshereinafilm(ADaywithThomasA.Edison)andonadiscrecording(LetUsNotForget).
-------------------------------
ThefirstgreatinventiondevelopedbyEdisoninMenloParkwasthetinfoilphonograph.Whileworkingtoimprovetheefficiencyofatelegraphtransmitter,henotedthatthetapeofthemachinegaveoffanoiseresemblingspokenwordswhenplayedatahighspeed.Thiscausedhimtowonderifhecouldrecordatelephonemessage.Hebeganexperimentingwiththediaphragmofatelephonereceiverbyattachinganeedletoit.Hereasonedthattheneedlecouldprickpapertapetorecordamessage.Hisexperimentsledhimtotryastylusonatinfoilcylinder,which,tohisgreatsurprise,playedbacktheshortmessageherecorded,"Maryhadalittlelamb.