Vortex was discovered by French physicists.

French physicist Leon Foucault discovered eddy currents.

The vortex phenomenon was discovered by French physicist Leon Foucault in 185 1 year. It is caused by the intersection of moving magnetic field and metal conductor, or the vertical intersection of moving metal conductor and magnetic field. In short, it is caused by electromagnetic induction effect. This action produces an electric current in the conductor.

When the current in one coil changes with time, induced current will be generated in another nearby coil due to electromagnetic induction. In fact, any conductor near this coil will produce induced current.

Foucault's related contributions:

During the period of 1845 ~ 1847, Foucault and Fizzo cooperated to improve Daguerre's photography technology and applied it to astronomical photography.

1847, Huygens' conical pendulum clock was improved and made into Foucault clock, which was later used to measure the earth's rotation.

1848 It is found that when sunlight passes through the carbon arc flame of sodium salt, two black lines appear at the sodium D line. Later, I learned that this is the absorption spectrum of sodium.

1852, the gyroscope was invented and the gyro compass effect was discovered. The photometer is designed in 1855.

1855, Foucault discovered that a disk moving in a magnetic field produces eddy current due to electromagnetic induction, which is called "Foucault current".