You'll never guess who made the first wireless telephone

3 days ago

Alexander Graham Bell is most credited with inventing the telephone in 1876, though other inventors like Elisha Gray also have claims.
Bell invented the first wireless telephone, the photophone, in 1880, which transmitted sound using light beams, predating radio by over a decade.
The photophone worked by converting sound into a modulated light beam via a mirror and then back into sound using a selenium cell, but it had limitations such as dependence on clear weather and short range.
Despite initial lack of public enthusiasm, the photophone was used as a secure communication method during World War I and II, and its principles later evolved into fiber-optic technology in the late 20th century.

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