Percy Spencer

The fact that microwaves could be used for cooking was discovered by Percy Spencer-a scientist with US-based Radar manufacturers, Raytheon- in 1945. He was working on an active radar set when he noticed that a candy bar he had in his pocket started to melt. The first food to be deliberately cooked with microwaves was popcorn, and the second was an egg (which exploded in the face of one of the experimenters)