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the photophone

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the photophone

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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.

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He invented the telephone, the photophone, and the original audiometer.

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A photophone is used to allow speech into a light beam. The invention was released in Feb. 19th, 1880 by Alexander Graham Bell.

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Very little, even today people do not really use videophones very often, even if their phones have the facility.

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