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Who discovered the microwave oven by accident?
Percy Spencer
What company was Spencer working for during his discovery?
Raytheon
What melted in Spencer’s pocket during the experiment?
A chocolate bar
What device was Spencer testing when he made the discovery?
A magnetron
What do magnetrons produce?
Microwaves
True or False: Spencer was trying to cook food on purpose?
False
What food did he test after the chocolate melted?
Popcorn
What was the first food he intentionally cooked?
Popcorn
What food exploded during one of his tests?
An egg
What did Spencer build to safely contain microwave energy?
A metal box (prototype microwave oven)
Why does metal reflect microwaves?
Because of free-moving electrons
What year was the first commercial microwave oven released?
1947
Why were early microwaves not popular?
They were huge and expensive
What is the main use of microwaves today?
Heating and cooking food
What scientific principle allows microwaves to heat food?
Microwaves make water molecules vibrate, creating heat
