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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 Zeptometers (zm) is equal to 1.0E-21 meters, while 1 Bohr Radius (Bohr) = 5.29177E-11 meters.| 203000 Zeptometers | to common length units |
|---|---|
| 203000 zm | = 2.03E-16 meters (m) |
| 203000 zm | = 2.03E-19 kilometers (km) |
| 203000 zm | = 2.03E-14 centimeters (cm) |
| 203000 zm | = 6.6601049868766E-16 feet (ft) |
| 203000 zm | = 7.992125984252E-15 inches (in) |
| 203000 zm | = 2.2200349956255E-16 yards (yd) |
| 203000 zm | = 1.2613835202418E-19 miles (mi) |
| 203000 zm | = 2.1456505654793E-32 light years (ly) |
| 203000 zm | = 7.6724419114887E-13 pixels (PX) |
| 203000 zm | = 1.26875E+19 planck length (pl) |