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The x unit (symbol xu) is a unit of length approximately equal to 0.1 pm (10−13 m). It is used to quote the wavelength of X-rays and gamma rays.
A unit of length used to measure nuclear distances, = 10−15 meter. Named for the Italian physicist Enrico Fermi (1901–1954). Now obsolete, replaced by the SI term femtometer (symbol, fm); 1 fermi = 1 femtometer.
In relation to the base unit of [length] => (meters), 1 X Unit (xu) is equal to 1.002004E-13 meters, while 1 Fermi (fermi) = 1.0E-15 meters.| 489000000 X Unit | to common length units |
|---|---|
| 489000000 xu | = 4.89979956E-5 meters (m) |
| 489000000 xu | = 4.89979956E-8 kilometers (km) |
| 489000000 xu | = 0.00489979956 centimeters (cm) |
| 489000000 xu | = 0.00016075457874016 feet (ft) |
| 489000000 xu | = 0.0019290549448819 inches (in) |
| 489000000 xu | = 5.3584859580052E-5 yards (yd) |
| 489000000 xu | = 3.0445942943212E-8 miles (mi) |
| 489000000 xu | = 5.1789446781524E-21 light years (ly) |
| 489000000 xu | = 0.1851892980396 pixels (PX) |
| 489000000 xu | = 3.062374725E+30 planck length (pl) |