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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 Earth Circumference (Ec) is equal to 40000000 meters, while 1 Bohr Radius (Bohr) = 5.29177E-11 meters.| 1 Earth Circumference | to common length units |
|---|---|
| 1 Ec | = 40000000 meters (m) |
| 1 Ec | = 40000 kilometers (km) |
| 1 Ec | = 4000000000 centimeters (cm) |
| 1 Ec | = 131233595.80052 feet (ft) |
| 1 Ec | = 1574803149.6063 inches (in) |
| 1 Ec | = 43744531.933508 yards (yd) |
| 1 Ec | = 24854.847689493 miles (mi) |
| 1 Ec | = 4.227882887644E-9 light years (ly) |
| 1 Ec | = 151181121408.65 pixels (PX) |
| 1 Ec | = 2.5E+42 planck length (pl) |
| Earth Circumference | to Bohr Radius (table conversion) |
|---|---|
| 1 Ec | = 7.5589075110974E+17 Bohr |
| 2 Ec | = 1.5117815022195E+18 Bohr |
| 3 Ec | = 2.2676722533292E+18 Bohr |
| 4 Ec | = 3.023563004439E+18 Bohr |
| 5 Ec | = 3.7794537555487E+18 Bohr |
| 6 Ec | = 4.5353445066585E+18 Bohr |
| 7 Ec | = 5.2912352577682E+18 Bohr |
| 8 Ec | = 6.0471260088779E+18 Bohr |
| 9 Ec | = 6.8030167599877E+18 Bohr |
| 10 Ec | = 7.5589075110974E+18 Bohr |
| 20 Ec | = 1.5117815022195E+19 Bohr |
| 30 Ec | = 2.2676722533292E+19 Bohr |
| 40 Ec | = 3.023563004439E+19 Bohr |
| 50 Ec | = 3.7794537555487E+19 Bohr |
| 60 Ec | = 4.5353445066585E+19 Bohr |
| 70 Ec | = 5.2912352577682E+19 Bohr |
| 80 Ec | = 6.0471260088779E+19 Bohr |
| 90 Ec | = 6.8030167599877E+19 Bohr |
| 100 Ec | = 7.5589075110974E+19 Bohr |
| 200 Ec | = 1.5117815022195E+20 Bohr |
| 300 Ec | = 2.2676722533292E+20 Bohr |
| 400 Ec | = 3.023563004439E+20 Bohr |
| 500 Ec | = 3.7794537555487E+20 Bohr |
| 600 Ec | = 4.5353445066585E+20 Bohr |
| 700 Ec | = 5.2912352577682E+20 Bohr |
| 800 Ec | = 6.0471260088779E+20 Bohr |
| 900 Ec | = 6.8030167599877E+20 Bohr |
| 1000 Ec | = 7.5589075110974E+20 Bohr |
| 2000 Ec | = 1.5117815022195E+21 Bohr |
| 4000 Ec | = 3.023563004439E+21 Bohr |
| 5000 Ec | = 3.7794537555487E+21 Bohr |
| 7500 Ec | = 5.6691806333231E+21 Bohr |
| 10000 Ec | = 7.5589075110974E+21 Bohr |
| 25000 Ec | = 1.8897268777744E+22 Bohr |
| 50000 Ec | = 3.7794537555487E+22 Bohr |
| 100000 Ec | = 7.5589075110974E+22 Bohr |
| 1000000 Ec | = 7.5589075110974E+23 Bohr |
| 1000000000 Ec | = 7.5589075110974E+26 Bohr |