Forbes contributors publish independent expert analyses and insights. We use the speed of light as a fixed velocity, from which all observers can define their own length scale. To measure the ...

It is hard to remember that a lot of high tech research went on well before the arrival of electronic computers, lasers, and all the other things that used to be amazing but are now commonplace.

No matter how fast you move, the light will always catch you. Nowadays we take the speed of light for granted. It's a fundamental constant of the universe: light simply travels at the speed it ...

A classic science experiment demonstrating how to use your microwave and a bar of chocolate to measure the speed of light is making the rounds, with easy-to-follow instructions for replicating the ...

During his time, many people considered light just to be some instantaneous thing that didn't have a speed. Here is Galileo's method to measure the speed of light. Take two lanterns at night and ...

There are a number of ways to measure the speed of light. If you’ve got an oscilloscope and a few spare parts, you can build your own apparatus for just a few bucks. Don’t believe the “lies ...

The speed of light was a mystery for millennia, a fugitive constant that escaped measurement and understanding. Now among the ...

They attempted to measure changes in the speed of light as the Earth orbited around the Sun. They found no such variation, and no experiment ever since then has either. Observations of the cosmic ...

No, seriously, we don't measure the speed of light (which always refers to the speed in a vacuum). We know exactly what the speed of light is. It is: c = 299,792,458 meters per second. And that is ...

As early as the late 1600s, though, scientist Ole Roemer was able to measure the speed of light (usually referred to as c) by using observations of Jupiter's moons, according to Britannica.

Ole Rømer was able to measure the speed of light by observing eclipses of Jupiter's moon Io. When Jupiter was closer to Earth, Rømer noted that eclipses of Io occurred slightly earlier than when ...