The Photophone, also known as a radiophone, was invented jointly by Alexander Graham Bell
He said it was his greatest invention.
It is a means of communication...through the transmission of light.
the photophone
He invented the telephone, the photophone, and the original audiometer.
A photophone is used to allow speech into a light beam. The invention was released in Feb. 19th, 1880 by Alexander Graham Bell.
I think it used only light to transmit messages instead of electricity... I could be wrong though you may want to try wikipedia
Very little, even today people do not really use videophones very often, even if their phones have the facility.
telephone and patent issues Bel and decibel photophone Metal detector Experimental aircraft hydrofoil
yes Alexander graham bell invented the photophone along with the telephone which made his rich and famous very fast. It has been suggested that Elisha Gray invented the telephone and lodged his patent at the same office, and just before Bell. The diagrams on Bell's application, look uncannily like Gray's. Although Gray applied before Bell, the credit went to Bell.
A list of the inventions I know of is: Telephone Graphaphone Wheat husker Photophone Metal detector Hydrofoil I may have missed some out, but I hope this helped anyway!
rca means radio corporation of America it was founded in 1919 it was taken over by General electric co. in 1986 its most notable projects were the infamous gramaphone, Rca photophone, Rca televisions.
Sound-on-film has existed since 1927, but it has only been in a digital format since around 1992. Disney films created before then (like all other sound films) recorded the sound effects and music on analog media. It was synchronized onto the film strips using either magnetic (just like a cassette tape) or optical (usually the RCA Photophone) formats. Most 35mm films still include an RCA Photophone track, in case the theater is not equipped to run digital sound or the digital equipment fails.
Alexander Graham Bell faced several failures throughout his career, particularly in his early experiments with sound transmission. Notably, he struggled with the commercial viability of his inventions, as he initially faced skepticism about the telephone's potential. Additionally, his attempts to develop a "photophone," which transmitted sound on a beam of light, were not successful in gaining widespread use. Despite these setbacks, Bell's perseverance ultimately led to groundbreaking advancements in communication technology.
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