They Doubted This "Teacup" Device — Until It Hunted Every U-Boat

In 1940, the experts said it was impossible to shrink a radar system. But in a cramped laboratory at the University of Birmingham, two physicists—John Randall and Harry Boot—ignored the rules. They drilled six holes into a block of copper and created the Cavity Magnetron, a device that would become the most valuable secret weapon of World War 2.

This video explores the hidden engineering behind the Tizard Mission and how this "teacup-sized" invention gave the Royal Air Force (RAF) the power to see through clouds, hunt German U-boats in the dark, and win the Battle of the Atlantic. While the Luftwaffe bombed British cities, this secret technology was quietly changing the course of history.

From the lab bench to the Tizard Mission in America, discover how British engineering genius defeated Hitler's forces and paved the way for modern technology—from airport radar to your kitchen microwave.

📚 References & Historical Sources: • The History of the Cavity Magnetron: https://www.birmingham.ac.uk/research... • The Tizard Mission & Secrets: https://www.iwm.org.uk/history/how-ra... • Original Prototype Details: https://collection.sciencemuseumgroup...

related queries: how radar works, ww2 secret weapons, cavity magnetron history, invention of microwave, british engineering ww2, john randall harry boot, tizard mission documentary, battle of the atlantic technology.

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