Geek Trivia

A “Barn” Is A Unit Of Measurement Used In What?

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Nuclear Physics
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Answer: Nuclear Physics

A “barn” is a unit of measurement used in nuclear physics. The term is derived from the colloquial saying “couldn’t hit the broadside of a barn” and refers to the difficultly of colliding two nuclear particles with each other. The actual area of the physicist’s “barn” is equal to 1.0×10−28 m2.

There are two derivative units of area measurement used less frequently: the outhouse (1.0×10−6 barns) and the shed (1.0×10−24 barns).