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Today in History–June 3–the Library of Congress features the invention of the photophone on this date in 1880 by Alexander Graham Bell. Although more famously known for the telephone, the photophone transmitted sound on a beam of light. This technology with the precursor to fiber optics which today transmits voice and data communications at the speed of light….
Today in History–March 10–the Library of Congress features Alexander Graham Bell, who made the first successful telephone call to his assistant Thomas Watson on this date in 1876. An audiologist, speech therapist and teacher of the deaf, Bell’s knowledge of the nature of sound likely encourage his experimentation. Another Bell invention was a metal detector, that was created to help…