* Einstein's Theory of Relativity: One of the fundamental principles of Einstein's theory of relativity is that the speed of light in a vacuum (approximately 299,792,458 meters per second) is a constant, regardless of the observer's motion.
* Mass-Energy Equivalence: Another key principle is that mass and energy are equivalent (E=mc²). This means that as an object approaches the speed of light, its mass increases infinitely.
* Infinite Energy: To accelerate an object with mass to the speed of light, you would need an infinite amount of energy. This is simply not possible.
What happens as an object gets close to the speed of light?
* Time Dilation: As an object approaches the speed of light, time slows down for that object relative to a stationary observer.
* Length Contraction: The length of the object in the direction of motion appears to contract from the perspective of a stationary observer.
In Summary: While we can't have a pebble traveling at the speed of light, it's a fascinating thought experiment that helps us understand the limits of physics and the incredible nature of the universe.
