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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.
The siriometer is a rarely used and an obsolete astronomical unit of length, defined to be equal to about one million astronomical units (au). One siriometer is approxim ..more definition+
In relation to the base unit of [length] => (meters), 1 Bohr Radius (Bohr) is equal to 5.29177E-11 meters, while 1 Siriometer (sir) = 1.496E+17 meters.| 1 Bohr Radius | to common length units |
|---|---|
| 1 Bohr | = 5.29177E-11 meters (m) |
| 1 Bohr | = 5.29177E-14 kilometers (km) |
| 1 Bohr | = 5.29177E-9 centimeters (cm) |
| 1 Bohr | = 1.7361450131234E-10 feet (ft) |
| 1 Bohr | = 2.083374015748E-9 inches (in) |
| 1 Bohr | = 5.7871500437445E-11 yards (yd) |
| 1 Bohr | = 3.2881534339458E-14 miles (mi) |
| 1 Bohr | = 5.593245957087E-27 light years (ly) |
| 1 Bohr | = 2.0000393070916E-7 pixels (PX) |
| 1 Bohr | = 3.30735625E+24 planck length (pl) |
| Bohr Radius | to Siriometer (table conversion) |
|---|---|
| 1 Bohr | = 3.5372794117647E-28 sir |
| 2 Bohr | = 7.0745588235294E-28 sir |
| 3 Bohr | = 1.0611838235294E-27 sir |
| 4 Bohr | = 1.4149117647059E-27 sir |
| 5 Bohr | = 1.7686397058824E-27 sir |
| 6 Bohr | = 2.1223676470588E-27 sir |
| 7 Bohr | = 2.4760955882353E-27 sir |
| 8 Bohr | = 2.8298235294118E-27 sir |
| 9 Bohr | = 3.1835514705882E-27 sir |
| 10 Bohr | = 3.5372794117647E-27 sir |
| 20 Bohr | = 7.0745588235294E-27 sir |
| 30 Bohr | = 1.0611838235294E-26 sir |
| 40 Bohr | = 1.4149117647059E-26 sir |
| 50 Bohr | = 1.7686397058824E-26 sir |
| 60 Bohr | = 2.1223676470588E-26 sir |
| 70 Bohr | = 2.4760955882353E-26 sir |
| 80 Bohr | = 2.8298235294118E-26 sir |
| 90 Bohr | = 3.1835514705882E-26 sir |
| 100 Bohr | = 3.5372794117647E-26 sir |
| 200 Bohr | = 7.0745588235294E-26 sir |
| 300 Bohr | = 1.0611838235294E-25 sir |
| 400 Bohr | = 1.4149117647059E-25 sir |
| 500 Bohr | = 1.7686397058824E-25 sir |
| 600 Bohr | = 2.1223676470588E-25 sir |
| 700 Bohr | = 2.4760955882353E-25 sir |
| 800 Bohr | = 2.8298235294118E-25 sir |
| 900 Bohr | = 3.1835514705882E-25 sir |
| 1000 Bohr | = 3.5372794117647E-25 sir |
| 2000 Bohr | = 7.0745588235294E-25 sir |
| 4000 Bohr | = 1.4149117647059E-24 sir |
| 5000 Bohr | = 1.7686397058824E-24 sir |
| 7500 Bohr | = 2.6529595588235E-24 sir |
| 10000 Bohr | = 3.5372794117647E-24 sir |
| 25000 Bohr | = 8.8431985294118E-24 sir |
| 50000 Bohr | = 1.7686397058824E-23 sir |
| 100000 Bohr | = 3.5372794117647E-23 sir |
| 1000000 Bohr | = 3.5372794117647E-22 sir |
| 1000000000 Bohr | = 3.5372794117647E-19 sir |