The microwave oven was invented in 1945 by Percy Spencer, a self-taught engineer working on radar technology for Raytheon, after he noticed a chocolate bar in his pocket melted near a magnetron.
Here's a more detailed account:
Accidental Discovery:
While working with radar technology and a magnetron (a device that produces microwaves), Spencer noticed a chocolate bar in his pocket had melted.
Further Experimentation:
Curious, he experimented with popcorn kernels and eggs near the magnetron, observing that the popcorn popped and the eggs cooked.
Development of the Microwave Oven:
Spencer and his team developed the first microwave oven, which was initially large and bulky, and intended for commercial use.
Early Commercial Use:
The first commercial microwave oven, called the "Radarange", was introduced in 1946 and was used in restaurants, canteens, and ship galleys.
Home Use:
Over time, microwave technology was refined, leading to smaller, more affordable models suitable for home kitchens.
Raytheon Patent:
Raytheon filed a patent for a microwave cooking process on October 8, 1945.
First Countertop Model:
The first countertop home model went on sale in the 1950s.
Widespread Adoption:
By 1997, nearly 90% of U.S. households owned a microwave oven.