In addition to finding the speed of light within 1 percent of its true value in 1850, he also showed that light travels slower through water than air and discovered the existence of eddy currents in a copper disk moving through a strong magnetic field, but he is best known for his device with proved that the earth rotates on its axis.
In addition to finding the speed of light within 1 percent of its true value in 1850, he also showed that light travels slower through water than air and discovered the existence of eddy currents in a copper disk moving through a strong magnetic field, but he is best known for his device with proved that the earth rotates on its axis.
In addition to finding the speed of light within 1 percent of its true value in 1850, he also showed that light travels slower through water than air and discovered the existence of eddy currents in a copper disk moving through a strong magnetic field, but he is best known for his device with proved that the earth rotates on its axis.
Jean-Bernard-Leon Foucault