 |
Alexander Graham Bell, inventor of the photophone
|
|
|
|
Alexander Graham Bell Invented the Photophone
June 3, 1880
You may know that a telephone uses electricity to send voice communications. However, you may not know that the man who invented the telephone, Alexander Graham Bell (1847-1922) had another invention that used light to transmit sound. He called it the photophone.
page 1 of 3
|
