Electrons can move at different speeds depending on their energy level and the medium through which they are traveling. In a conductive material like a wire, electrons typically move at an average speed called the drift velocity, which is quite slow, on the order of millimeters per second. However, it's important to note that individual electrons can move at much higher speeds due to thermal motion.
On the other hand, the speed of light in a vacuum is approximately 299,792,458 meters per second, which is commonly rounded to about 300,000 kilometers per second or 186,000 miles per second. This speed is denoted by the symbol 'c' in physics and is considered a fundamental constant in the theory of relativity. It represents the maximum speed at which information or energy can travel through space.