The story about the Tesla Egg of Columbus…There is a legend about Christopher Columbus winning a wager against his critics by making an egg stand on its tip. That story is often used to illustrate the fact that it is often simple to understand the discovery after it already happened. That principle is certainly true in case of famous inventor Nikola Tesla who discovered principles of rotating (rotary) magnetic field. His discoveries lead to the invention of the polyphase induction motor. Although Tesla didn’t discover alternating current, he was the first one to effectively harness it and use it to do useful work.
