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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 Bohr Radius (Bohr) is equal to 5.29177E-11 meters, while 1 Varas [California] (vr[California]) = 0.83820168 meters.| 21 Bohr Radius | to common length units |
|---|---|
| 21 Bohr | = 1.1112717E-9 meters (m) |
| 21 Bohr | = 1.1112717E-12 kilometers (km) |
| 21 Bohr | = 1.1112717E-7 centimeters (cm) |
| 21 Bohr | = 3.6459045275591E-9 feet (ft) |
| 21 Bohr | = 4.3750854330709E-8 inches (in) |
| 21 Bohr | = 1.2153015091864E-9 yards (yd) |
| 21 Bohr | = 6.9051222112861E-13 miles (mi) |
| 21 Bohr | = 1.1745816509883E-25 light years (ly) |
| 21 Bohr | = 4.2000825448923E-6 pixels (PX) |
| 21 Bohr | = 6.945448125E+25 planck length (pl) |