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During World War II, workers at technology company Raytheon were designing and creating the magnetron tubes used in U.S. and British radars. Standing in front of one of these magnetrons one day, ...

It may seem like a holdout against the solid-state world, but the vacuum-tube magnetron is still at the heart of every consumer microwave oven and many commercial ones used for cooking or drying.

There’s a reason the microwave oven in your kitchen is a heavy brick: it uses a magnetron and vacuum tube technology that dates back to World War II. But since then, microwave technologies have been ...

Your microwave: It heats up your leftovers, pops your popcorn, and makes your old coffee slightly less awful. Chances are, you’re not using it as much as you used to. But if there’s one thing we all ...

Percy Spenser was conducting radar experiments during World War II when he got close to a microwave-emitting tube and accidentally melted the candy bar in his pocket. (Eureka!) Spenser quickly ...