List Of Does Lightning Travel At The Speed Of Light 2023 . Consider this… the speed of light is 299,792 kilometers per second (186,282 miles per second), and when an object moves at this speed, it behaves like an object with infinite mass. Web huygens came up with a figure of 131,000 miles per second (211,000 kilometers per second), a number that isn't accurate by today's standards — we now know that the speed of light in the vacuum. How Fast Is Lightning? Is Sound Slower Than Light? Snoop Lion from snooplion.com Compare that to thunder, which moves at the speed of sound. Web s = d/t where, s is the speed of lightning d is the distance traveled by lightning, and t is the time taken to travel a total distance for example, calculate the speed of lightning, if it traveled 1200 km in 2 min. Consider this… the speed of light is 299,792 kilometers per second (186,282 miles per second), and when an object moves at this speed, it behaves like an object with infinite mass.