What is Microwave oven?
[[File:Silver GE Microwave.jpg|thumb|A microwave oven]] A '''microwave oven''' (commonly called a '''microwave''') is a machine that [[cooking|cooks]] [[food]] using [[microwave]]s, a type of [[radio wave]]. The idea was invented when a scientist who was experimenting with radio waves saw his [[chocolate]] bar, which was in his pocket, had melted. He then knew that radio waves could cook food and invented the microwave oven. <ref>{{cite web |title=Melted Chocolate to Microwave |url=https://www.technologyreview.com/1999/01/01/236818/melted-chocolate-to-microwave |website=MIT Technology Review |accessdate=19 August 2023 |language=en}}</ref> == History == [[File:Wall of microwaves.JPG|thumb|Microwave ovens, several from the 1980s]] In 1945, the heating effect of a high-power microwave beam was accidentally discovered by [[Percy Spencer]], an American self-taught engineer from [[Howland, Maine]]. Hired by [[Raytheon]] at the time, he noticed that microwaves from an active radar set he was working on started to melt a [[chocolate bar]] he had in his pocket. First, Spencer deliberately cooked popcorn with a microwave oven. And the second time, he cooked an egg, which exploded in the face of one of the experimenters.<ref>{{cite web| url=http://www.gallawa.com/history.html | archive-url=https://web.archive.org/web/20130531120513/http://www.gallawa.com/history.html | url-status=dead | archive-date=2013-05-31 |title=The History of the Microwave Oven |first=John Carlton|last= Gallawa |year=1998}}</ref><ref>{{YouTube|4h1ESUz2H3E|Radar — Father of the Microwave Oven}}</ref> <ref>{{cite web |title=Melted Chocolate to Microwave |url=https://www.technologyreview.com/1999/01/01/236818/melted-chocolate-to-microwave |website=MIT Technology Review |accessdate=19 August 2023 |language=en}}</ref> To prove his finding, Spencer created a high-density electromagnetic field by feeding microwave power from a magnetron into a metal box from which it had no way to escape. When food was placed in the box with the microwave energy, the tempe