Alexander Graham Bell develops thephotophonewhich uses sunlight to carry messages. It was never commercially produced. 亚历山大.格雷厄姆.贝尔利用 开发 电用于传输信息。这种 电 从未用于商业生产。 声明:以上例句、词 均由互联网资源自动生成,部 未经过人工审核,其表达内容亦不代表本软件的观点;若发现问题,欢迎...
In 1880, the noted inventor Alexander Graham Bell created a device called a 'photophone' which could transmit voice communications using light, which was demonstrated to work over distances as much as 200m. LiFi set to light up the last mile The third part of the piece is a text by Bridle...
Most people know Alexander Graham Bell invented the telephone. But not many know about another talking device (equipment) he invented just four years later,in 1880. He called the device the photophone. "Photophone" comes form the Greek words for "light" and "sound". The photophone did not ...
美['foʊtoʊfoʊn] 是什么意思 n. 光电话,光线电话; 英英释义 Photophone The photophone (later given the alternate name radiophone) is a telecommunications device which allowed for the transmission of speech on a beam of light. It was invented jointly by Alexander Graham Bell and his assi...
photophone是什么意思 n.光线电话机(光音机;光通话) photophone英英释义 abstract:The photophone (later given the alternate name radiophone) is a telecommunications device which allowed for the transmission of speech on a beam of light. It was invented jointly by Alexander Graham Bell and his assistant...
Alexander Graham BellJournal of the Franklin InstituteTHE PHOTOPHONE. Alex,er Graham Be. Science . 1880Bell A G. The Photophone[J].Journal of the Franklin Institute,1880,(04):237-248.Bell A G.The Photophone.Journal of the Franklin Institute.0.237-248...
The invention of light-wave communications in 1880 by Alexander Graham Bell and Sumner Tainter is reviewed. The events leading to the invention, the optimization of selenium detectors and the phenomenon of sound emission by substances illuminated by a concentrated beam of intermittent light, are disc...
美['foʊtoʊfoʊn] 英['fəʊtəfəʊn] n.【信】光线电话机;光音机 网络光电话;光音器;光电话机 英汉 网络释义 n. 1. 【信】光线电话机;光音机
美['foʊtoʊfoʊn] 英['fəʊtəfəʊn] n.【信】光线电话机;光音机 网络光电话;光音器;光电话机 英汉 网络释义 n. 1. 【信】光线电话机;光音机 释义: 全部,光线电话机,光音机,光电话,光音器,光电话机
On June 3, 1880,Alexander Graham Belltransmitted the first wireless telephone message on his newly invented "photophone," a device that allowed for the transmission of sound on a beam of light. Bell held four patents for the photophone and built it with the help of an assistant, Charles Sumn...