Convert femtometer to X-unit
Please provide values below to convert femtometer [fm] to X-unit [X], or Convert X-unit to femtometer.
How to Convert Femtometer to X-Unit
1 fm = 0.00997924317419767 X
Example: convert 15 fm to X:
15 fm = 15 × 0.00997924317419767 X = 0.149688647612965 X
Femtometer to X-Unit Conversion Table
| femtometer | X-unit |
|---|
Femtometer
A femtometer is a unit of length in the metric system equal to 10^-15 meters. It is also known as a fermi.
History/Origin
The prefix "femto-" for 10^-15 was adopted by the CGPM (General Conference on Weights and Measures) in 1964. The unit is also named after the physicist Enrico Fermi.
Current Use
The femtometer is primarily used in nuclear physics to measure the size of atomic nuclei.
X-Unit
An X-unit is a unit of length approximately equal to 1.002 x 10⁻¹³ meters.
History/Origin
The X-unit was proposed by the Swedish physicist Manne Siegbahn in 1919 for measuring the wavelengths of X-rays and gamma rays.
Current Use
The X-unit has been largely replaced by the angstrom and the picometer.