What exactly is a Joule? Well, it’s not a Diamond!
Ever heard someone say that a laser is operating at say, “15 Joules per centimeter squared” and wonder what exactly is being said. What is a Joule? Does it have anything to do with rubies or diamonds? And where does the term come from? The answer may surprise you…. James Prescott Joule (1818-1889) was an […]