4 ms·
Also, don't both photons in fiber and electrons in copper wire travel around 60% of the speed of light?
by sirclueless 14y ago
Also, don't both photons in fiber and electrons in copper wire travel around 60% of the speed of light?
- alexkus 14y agoIn most fiber optic cable photons travel at about ~65% of c. The exact number depends on the refractive index of the fiber. For electricity: Paraphrasing https://en.wikipedia.org/wiki/Speed_of_electricity https://en.wikipedia.org/wiki/Speed_of_electricity The 'Current' travels along a wire at anything between 97% and 60% of c (depending on insulation; more insulation == slower). Individual electrons in copper wire travel much more slowly. The 'drift velocity' is roughly proportional to the voltage; for low voltage DC it is the order of millimeters per hour. For AC voltage individual electrons don't have any net movement since they're oscillating back and forth with the alternating current.