핵물리학에서 사용하는 길이의 단위로, 10의 -15승 미터(1펨토미터)와 동일하다.
A unit of length equal to 10⁻¹⁵ meter (one femtometer), commonly used in nuclear physics to describe the scale of atomic nuclei.
예문:
"The diameter of a proton is approximately 1.7 fermis."
"Physicists often use the fermi as a convenient scale for measuring nuclear radii."
"One fermi is equivalent to one quadrillionth of a meter."