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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 Roman Actus (actus) is equal to 35.5 meters, while 1 Bohr Radius (Bohr) = 5.29177E-11 meters.| 138000 Roman Actus | to common length units |
|---|---|
| 138000 actus | = 4899000 meters (m) |
| 138000 actus | = 4899 kilometers (km) |
| 138000 actus | = 489900000 centimeters (cm) |
| 138000 actus | = 16072834.645669 feet (ft) |
| 138000 actus | = 192874015.74803 inches (in) |
| 138000 actus | = 5357611.5485564 yards (yd) |
| 138000 actus | = 3044.0974707707 miles (mi) |
| 138000 actus | = 5.178099566642E-10 light years (ly) |
| 138000 actus | = 18515907844.524 pixels (PX) |
| 138000 actus | = 3.061875E+41 planck length (pl) |