* Relativity: Einstein's theory of relativity states that nothing with mass can travel at the speed of light. Electrons have mass, even if it's very small.
* Speed of Light as a Limit: The speed of light (approximately 299,792,458 meters per second) is the fastest speed anything can travel in a vacuum. This is a fundamental constant of the universe.
* Electron Drift Velocity: Electrons in materials like wires actually move quite slowly, typically a few millimeters per second. The speed of electricity in a wire is not the speed of individual electrons, but the speed at which the electric field propagates, which is close to the speed of light.
In summary: Electrons can move very fast, but they are always limited by the speed of light and never reach that speed.
