We know that measuring the speed of light with an Arduino is possible. It’s just that the implementation is hard. [Udo] hit upon the idea of pulsing a laser pointer and measuring the time of 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.

He concluded that light takes time to travel and we now know this is at a constant speed of 299,792,458 m/s. This clip is from the series Wonders of the Universe. This clip could be used as part ...

The speed of light (the “c” in Einstein’s E = mc2 ) is 186,282 miles per second. Knowing its precise value is critical to understanding almost everything in the universe, from measuring ...