Leon Foucault

Fizeau, Foucault and Astronomical Photography

Fizeau, Foucault and Astronomical Photography

On April 2, 1845, Armand Hippolyte Louis Fizeau and Jean Bernard Léon Foucault manage to make the very first photography of the Sun. Thereby, they both initiated astronomical photography. “To contribute usefully to the advance of science, one must sometimes not disdain from undertaking simple verifications.” – Léon Foucault (in The Life and Science of Léon Foucault : The Man Who Proved the Earth Rotates, 2003Fou by William Tobin) Before Astronomical Photography From…
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Albert Abraham Michelson and the Famous Experiment that lead to Einstein’s Special Relativity Theory

Albert Abraham Michelson and the Famous Experiment that lead to Einstein’s Special Relativity Theory

On December 19, 1859, US-american physicist Albert Abraham Michelson was born. Together with his colleague Edward Williams Morley he conducted an experiment that proved the by the time famous ether theory to be wrong and is considered to be one of the pilars of the theory of relativity. “While it is never safe to affirm that the future of Physical Science has no marvels in store even more astonishing than those of the…
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Leon Foucault demonstrating the Effect of the Earth’s Rotation

Leon Foucault demonstrating the Effect of the Earth’s Rotation

On January 3, 1851, French physicist Leon Foucault started to experiment with his eponymous pendulum, by which he was able to proof the earth‘s rotation. Actually, how can you prove that the earth is a rotating orb in an easy-to-see experiment and – of course – without spaceflight? By today, Foucault’s simple device is part of numerous natural science museums around the world. The Pendulum Ok, how does Foucault’s pendulum work? The apparatus consists…
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Hippolyte Fizeau and the Speed of Light

Hippolyte Fizeau and the Speed of Light

Hippolyte Fizeau (1819-1896) photo: Charles Reutlinger, Académie des Sciences, Smithsonian Institution Libraries On September 23, 1819, French physicist Armand Hippolyte Louis Fizeau was born. He is well known for his calculation of the speed of light and his suggestion to use length of a light wave be used as a length standard. Hippolyte Fizeau was born in Paris as the eldest son of Béatrice and Louis Fizeau, who was professor of Pathology at the…
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