[DOC] [TLE] Photophone - Wikipedia [PAR] The photophone is a telecommunications device that allowed for the 
transmission of speech on a beam of light. It was invented jointly by Alexander 
Graham Bell and his assistant Charles Sumner Tainter on February 19, 1880, at 
Bell's ... Using a fully modulated beam of sunlight as a test signal, one 
experimental receiver... [DOC] [TLE] Back to the future - In 1880 Alexander Graham Bell invented the ... [PAR] Sep 18, 2016 ... The photophone was in fact, the World's first device for wireless communications, 
... Bell's photophone was based on transmitting sound on a beam of light. A 
person's voice was projected through an instrument toward a mirror. ... He told 
the reporter that the photophone is the greatest invention [I have] ever... [DOC] [TLE] Alexander Graham Bell and the Photophone - Inventors - About.com [PAR] Jun 15, 2015 ... Alexander Graham Bell's Photophone: An Invention Ahead of Its Time ... While 
he's best known as the inventor of the telephone, Alexander Graham Bell ... the 
first wireless telephone message on his newly invented "photophone," a device 
that allowed for the transmission of sound on a beam of light. [DOC] [TLE] Alexander Graham Bell - New World Encyclopedia [PAR] Mar 3, 2016 ... In 1880, Bell received the Volta Prize which he used to fund the Volta ... In 1874, 
telegraph message traffic was rapidly expanding and had become "the .... 
Another of Bell's inventions was the photophone, a device enabling the 
transmission of sound over a beam of light, which he developed together with... [DOC] [TLE] Alexander Graham Bell facts, information, pictures | Encyclopedia ... [PAR] After years of teaching and study, Bell invented Visible Speech, a set of ... School 
for the Deaf in Boston, he instead sent his partner and son, Alexander Graham. ... 
a multiple telegraph, a device that could transmit two or more messages over 
wire ... including the photophone, a device that transmits sound on a beam of 
light. [DOC] [TLE] Fiber Optic History | Jeff Hecht [PAR] City of Light: The Story of Fiber Optics, tells the story in much greater depth. ... on 
towers, where human operators relayed messages from one tower to the next. ... 
which he called the Photophone, in 1880, but his earlier invention, the telephone, 
... He dreamed of sending signals through the air, but the atmosphere didn't... [DOC] [TLE] Example Essays: Alexander Graham Bell Telephone [PAR] The telephone, photophone, tetrahedron, silver dart, hydrofoil, and the iron lung. 
... Of course the first message was sent to Alexander Graham Bell, the ... 
Alexander Graham Bell was not trying to invent the telephone, he was just trying 
to help .... through about 600 feet of free space (air) using a beam of light as the 
carrier). [DOC] [TLE] Example Essays: Bell Telephone Company [PAR] In 1876, at the age of 29, Alexander Graham Bell invented his telephone. .... and 
on June 3, 1880, he transmitted the first wireless telephone message on his new 
... through about 600 feet of free space (air) using a beam of light as the carrier). 
... this great device that would actually send voice over an electrical transmission. [DOC] [TLE] Experimenter's Corner - ePanorama.net [PAR] THE PHOTOPHONE CENTENNIAL: 1880-1980 I. AVE YOU ever ... year of the 
invention of light-wave communications. On February ... net result was an 
amplitude-modulated light beam. .... foil-covered board he was using to reflect 
sunlight at balloon crews ... We found that we were able to send voice messages 
to a nearby. [DOC] [TLE] Fiber-Optic and Satellite Communications - TechNet - Microsoft [PAR] In 1880, four years after he invented the telephone, he patented an ... This device
, illustrated in Figure 7.1, transmitted a voice signal over a ... The photophone 
demonstrated the basic principle of optical communications as it is practiced 
today. ... light source, and systems were tried using both the atmosphere and 
beam... [DOC] [TLE] Alexander Graham Bell - Biography in Context

Question: In 1880 he invented the photophone, a device that sent messages through the air on beams of light
Answer: Alexander Graham Bell