# At What Speed Does Light Travel?

## What limits the speed of light?

Nothing can travel faster than 300,000 kilometers per second (186,000 miles per second). What’s more, only light can travel at this speed. It’s impossible to accelerate any material object up to the speed of light because it would take an infinite amount of energy to do so.

## Will we ever travel at the speed of light?

As objects move faster and closer to the speed of light, they gain mass. So no, you can’t travel at the speed of light. Nothing with any mass can, not even subatomic particles. Light has no mass, so in clear space it is always traveling at the “speed of light” by definition.

## What is the speed of light 3×10 8?

The speed of light is measured to have the same value of c = 3×108 m/s no matter who measures it.

## What happens if we travel at the speed of light?

No, we cannot travel at the speed of light. You see, if an object travels at the speed of light, its mass will increase exponentially! Consider thisâ€¦ the speed of light is 300,000 kilometers per second (186,000 miles per second) and when an object moves at this speed, its mass will become infinite.

## How fast is the speed of dark?

This mysterious energy makes up 80 percent of all matter in the universe. In a 2013 study, scientists determined that dark matter should have a speed of 54 meters per second, or 177 feet — slow compared to the speed of light [source: Armendariz-Picon and Neelakanta].

## Is anything faster than the speed of light?

There is no limit to how fast the universe can expand, says physicist Charles Bennett of Johns Hopkins University. Einstein’s theory that nothing can travel faster than the speed of light in a vacuum still holds true, because space itself is stretching, and space is nothing.