Although the photophone was an extremely important invention, the significance of Bell's work was not fully recognized in its time. This was largely due to practical limitations in the technology of the time: Bell's original photophone failed to protect transmissions from outside interferences, such...
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...
The article examines the significance that Alexander Graham Bell's attitude and actions had on the social and economic conditions experienced by deaf peopl... SH Mitchell - 《Am Ann Deaf》 被引量: 10发表: 1971年 Friendly letters on the correspondence of Helen Keller, Anne Sullivan, and Alexand...
Alexander Graham Bell, ___ Scottish inventor, is often associated with the invention of ___ telephone. A. /; a B. the; / C. a; the D. a; a 免费查看参考答案及解析 题目: AlexanderBell is believed ___ the first telephone. A. to invent B....
Blake, Alexander Graham Bell, Emily Dickinson, Charlie Chaplin, and Ludwig Wittgenstein, not to mention Albert Einstein and Howard Hughes. If we could gain even the barest glimpse into how all those people came to be the way they were, it might just help the rest of us to be more ...
in burning with many blushes the diaries of these puppy periods, the Stevenson estimate of this branch of literary art has its significance to the student of Pepys. All this, however, he tells us, was not the most efficient part of his training. It was good for him, of course; but ...
The haunting influence of Alexander Graham Bell. The article examines the significance that Alexander Graham Bell's attitude and actions had on the social and economic conditions experienced by deaf peopl... SH Mitchell - 《Am Ann Deaf》 被引量: 10发表: 1971年 Alexander Graham Bell and the va...