1. World’s great person. ppt
2007通信工程
韦 雄

2. World's Great Person World’s Great Person
Edison is a great world-famous
inventor. The invention of his life
in the world are second to none.

3. In science and technology Edison’s
most significant contribution were the invention of the phonograph （留声机）and incandescent lamp（白炽灯）。
On October 22 , 1879, Edison ignited the electric lamp the first having broad practical value.

5. Edison also made great contribution to
movies, trams(有轨电车), mining(采矿),
building, as well as weapons and so on,
there are many well-known inventions.

7. 老夫是做电灯泡滴！ Edison also observed the phenomena that
light bulb in a vacuum can cause the hot
electron emission（热电子发射现象 ） also
called "Edison effect", the discovery of hot
Electron emission, lay the foundation for the
development of electron tubes.（电子管）
>>>Electric bulb

8. Telegraph

9. Other inventions Cast a ballot counter（投票计数器）1868-10-11
Printing machine （印刷机）1870
Sound wave analyses resonator （声波分析谐振器）1875
Iron nickel accumulator cell（铁镍蓄电池）1900
Movietone （有声电影）1912
。。。。。。。

10. There are many
inventions during
Edison’s life ,he
had made great
contribution to
the human-beings
Edison passed
away on October
18 , 1931, at the
age of 84.