Barn

Barn is area unit, symbol: [b]. Definition of 1 barn ≡ 10−28 m². Originally used in nuclear physics for expressing the cross sectional area of nuclei and nuclear reactions. . Compared to square metre, barn is smaller unit.

• 1 [b] = (exactly) `1*10^-28` [m²]

• 1 [m²] = (exactly) `1/(1*10^-28)` [b] = 1.0 × 10+28 [b]


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[b]
=? square millimetre
=? square centimetre
=? square metre
=? square kilometre
=? acre
=? hectare
=? square link (Gunter's)(International)

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