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To convert Bohr radii to meters: multiply by 5.29177210903 × 10⁻¹¹.
a₀ = ℏ/(mec α) = 4πε₀ℏ²/(mee²) ≈ 5.29177 × 10⁻¹¹ m, where α is the fine-structure constant.
For example, 1 Bohr Radius (a₀) = 5.787152e-11 Yard (yd).
| Bohr Radius (a₀) | Yard (yd) |
|---|---|
| 0.1 | 5.787152e-12 |
| 0.5 | 2.893576e-11 |
| 1 | 5.787152e-11 |
| 2 | 1.157430e-10 |
| 5 | 2.893576e-10 |
| 10 | 5.787152e-10 |
| 25 | 1.446788e-9 |
| 50 | 2.893576e-9 |
| 100 | 5.787152e-9 |
| 500 | 2.893576e-8 |
| 1000 | 5.787152e-8 |
The Bohr radius is the most probable distance between the nucleus and the electron in a ground-state hydrogen atom, approximately 5.292 × 10⁻¹¹ meters.
a₀ = ℏ/(mec α) = 4πε₀ℏ²/(mee²) ≈ 5.29177 × 10⁻¹¹ m, where α is the fine-structure constant.
To convert Bohr radii to meters: multiply by 5.29177210903 × 10⁻¹¹.
Sets the characteristic scale for atomic sizes. Most atoms have radii of 1–3 Bohr radii.
The Bohr radius gives atoms their characteristic size of ~1 Å (10⁻¹⁰ m), explaining why matter has the volume it does.
Confusing Bohr radius with atomic radius — the Bohr radius is specific to hydrogen; other atoms have different sizes.
The Bohr radius tells you 'how big atoms are' — about 0.5 angstroms. It's the atomic analog of a ruler for atomic-scale physics.
The yard is a unit of length equal to 3 feet or 36 inches, exactly 0.9144 meters.
1 yd = 3 ft = 36 in = 0.9144 m. There are 1,760 yards in one mile.
To convert yards to meters: multiply by 0.9144. To convert meters to yards: multiply by 1.09361.
American football (100-yard field), fabric purchasing (sold by the yard), golf (distance markers), and landscaping.
An American football field is exactly 100 yards (91.44 m) long. A yard is only about 9% shorter than a meter.
Assuming a yard equals a meter — a yard is about 91 cm, not 100 cm. Close but not identical.
A yard is roughly one big step. It's 3 feet, and a meter is about 3.28 feet — very close but not the same.



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