Question

Barn is used to measure the cross-sectional area of the mucles of an atom. IT is equal to
A. `10^(-28) m^(2)`
B. `10^(-25) m^(2)`
C. `10^(-31) m^(2)`
D. `10^(-17) m^(2)`

Answer 1

Correct Answer - C
Barn is the unit of area for measurring the cross-section of nuclei. 1 barn equals `10^(-24) cm^(2)` or `10^(-28) m^(2)`.