Your computer converts the 1’s and 0’s into tiny flashes of light. 1’s might mean to keep the light on for a fraction of a second, while 0’s might mean to keep the light off for the same amount of time. These flashes of light then travel through the fiber-optic cable. Since the fiber-optic cable is made of clear glass,[372] information can travel incredibly fast: about two-thirds the speed of light.[373]
