Charles Wheatstone (1802-1875), British physicist. Wheatstone study of acoustics and the theory of resonance of columns of air, lead to his 1829 inven
Charles Wheatstone (1802-1875), British physicist. Wheatstone study of acoustics and the theory of resonance of columns of air, lead to his 1829 invention of the concertina musical instrument. He invented the printing telegraph (1841) and the single-needle telegraph (1845). He also worked on a commercial electric telegraph project which led to the construction of thousands of kilometres of telegraph lines. He popularised the Wheatstone bridge, invented by Samuel Christie, which measures resistance in electrical circuits. Wheatstone also invented the stereoscope (1838) for making three-dimensional photographic images.
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