attometri
An attometer is a unit of length in the metric system, representing one sextillionth of a meter. It is equal to 10^-18 meters. The prefix "atto-" signifies a factor of 10^-18. This is an extremely small unit, far smaller than the diameter of a proton, which is approximately 0.84 attometers. The attometer is primarily used in fields like particle physics and nuclear physics to describe the dimensions of subatomic particles and the distances involved in nuclear interactions. For context, a meter is 1,000,000,000,000,000,000 attometers. The concept of the attometer, like other metric prefixes, was established by the International System of Units (SI). While theoretical, the attometer scale allows scientists to discuss phenomena at the fundamental limits of our current understanding of matter and space.