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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.
An em is a unit in the field of typography, equal to the currently specified point size. For example, one em in a 16-point typeface is 16 points. Therefore, this unit is the sa ..more definition+
In relation to the base unit of [length] => (meters), 1 Bohr Radius (Bohr) is equal to 5.29177E-11 meters, while 1 Ems (EM) = 0.0042175176 meters.| 2100 Bohr Radius | to common length units |
|---|---|
| 2100 Bohr | = 1.1112717E-7 meters (m) |
| 2100 Bohr | = 1.1112717E-10 kilometers (km) |
| 2100 Bohr | = 1.1112717E-5 centimeters (cm) |
| 2100 Bohr | = 3.6459045275591E-7 feet (ft) |
| 2100 Bohr | = 4.3750854330709E-6 inches (in) |
| 2100 Bohr | = 1.2153015091864E-7 yards (yd) |
| 2100 Bohr | = 6.9051222112861E-11 miles (mi) |
| 2100 Bohr | = 1.1745816509883E-23 light years (ly) |
| 2100 Bohr | = 0.00042000825448923 pixels (PX) |
| 2100 Bohr | = 6.945448125E+27 planck length (pl) |