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The yoctometer (symbol: ym) or yoctometre (International spelling) is an SI measure of length that is equal to 10-24 (yocto) of a meter. It is the smallest named subdivision of the meter in the SI base unit of length.
The Bohr radius (a0 or rBohr) is a physical constant, approximately equal to the most probable distance between the proton and electron in a hydrogen atom in its ground state. It is named after Niels Bohr, due to its role in the Bohr model of an atom. Its value is 5.2917721067×10^−11 m.
In relation to the base unit of [length] => (meters), 1 Yoctometers (ym) is equal to 1.0E-24 meters, while 1 Bohr Radius (Bohr) = 5.29177E-11 meters.| 638900 Yoctometers | to common length units |
|---|---|
| 638900 ym | = 6.389E-19 meters (m) |
| 638900 ym | = 6.389E-22 kilometers (km) |
| 638900 ym | = 6.389E-17 centimeters (cm) |
| 638900 ym | = 2.0961286089239E-18 feet (ft) |
| 638900 ym | = 2.5153543307087E-17 inches (in) |
| 638900 ym | = 6.9870953630796E-19 yards (yd) |
| 638900 ym | = 3.9699405472043E-22 miles (mi) |
| 638900 ym | = 6.7529859422894E-35 light years (ly) |
| 638900 ym | = 2.4147404616996E-15 pixels (PX) |
| 638900 ym | = 3.993125E+16 planck length (pl) |