(Roughly) Daily

Posts Tagged ‘iteration

“Iteration, like friction, is likely to generate heat instead of progress”*…

A word of caution from the wondrous Randall Munroe (@xkcd): “Rotatation.”

* George Eliot, The Mill on the Floss


As we resist repetition, we might send perpetual birthday greetings to Jean Bernard Léon Foucault; he was born on this date in 1819.  A physicist who made an early measurement of the speed of light, discovered eddy currents, and is credited with naming the gyroscope (although he did not invent it), Foucault is best remembered for the (eponymously-named) Foucault’s Pendulum– suspended from the roof of the Panthéon in Paris– demonstrating the effects of the Earth’s rotation.  Using a long pendulum with a heavy bob, he showed its plane was not static, but rotated at a rate related to Earth’s angular velocity and the latitude of the site.

In fact, essentially the same experimental approach had been used by Vincenzo Viviani as early as 1661; but it was Foucault’s work that caught the public imagination: within years of his 1851 experiment, the were “Foucault’s Pendulums” hanging– and attracting crowds–in major cities across Europe and America.


Written by (Roughly) Daily

September 18, 2022 at 1:00 am

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