How Fast Does Light Travel From New York To Paris?

How Fast Does Light Travel From New York To Paris? For light to travel from New York to Paris and then back again would take 40 milliseconds. How long would it take to travel 25000 light years? The closest galaxy is the recently discovered Canis Major dwarf galaxy, which is “only” 25,000 light-years away. So

How Fast Do Visible Light Waves Travel Through Space?

How Fast Do Visible Light Waves Travel Through Space? Electromagnetic waves all travel through empty space at the same constant speed – the velocity of light. This velocity is usually denoted by the lower case letter c, and it has a value of roughly 300 000 000 meters per second. A more exact value is