Speed of Light in Vacuum

The speed of light in a vacuum is the fastest speed at which electromagnetic waves, including visible light, can travel—approximately 299,792 kilometers per second (186,282 miles per second). This universal constant, denoted as "c," is fundamental to physics, influencing how we understand space, time, and the universe. Light travels through empty space without any medium, making it unique among waves. Its incredible speed sets the ultimate speed limit for information and matter, shaping our understanding of fundamental physical laws.