Published by:
CGP EDU Academic Team
Published on: September 12, 2026
The nuclear cross-section is measured in barn, it is equal to
Text Solution
Verified by ExpertsThe correct answer is:
A
Definition of Barn:
A barn (symbol: $\text{b}$) is a non-SI unit of area used in nuclear physics and high-energy particle physics to quantify the scattering or reaction cross-section of atomic nuclei.
Conversion:
One barn is defined as:
$$1\text{ barn} = 10^{-28}\text{ m}^2 = 10^{-24}\text{ cm}^2$$
The name 'barn' was coined during World War II by American physicists working on the Manhattan Project, as the cross-sectional area of an atomic nucleus ($\\sim 10^{-28}\text{ m}^2$) seemed as large as a 'barn' to a subatomic particle.
Therefore, the correct option is A (representing $10^{-28}\text{ m}^2$).
A barn (symbol: $\text{b}$) is a non-SI unit of area used in nuclear physics and high-energy particle physics to quantify the scattering or reaction cross-section of atomic nuclei.
Conversion:
One barn is defined as:
$$1\text{ barn} = 10^{-28}\text{ m}^2 = 10^{-24}\text{ cm}^2$$
The name 'barn' was coined during World War II by American physicists working on the Manhattan Project, as the cross-sectional area of an atomic nucleus ($\\sim 10^{-28}\text{ m}^2$) seemed as large as a 'barn' to a subatomic particle.
Therefore, the correct option is A (representing $10^{-28}\text{ m}^2$).
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