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 existe
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