Convert Bohr radius to foot (US survey) Online | Free Length Converter

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Bohr Radius


The Bohr radius is a fundamental physical constant that represents the average distance between the nucleus and the electron in a hydrogen atom in its ground state, according to the Bohr model of the atom.



  • Its value is approximately 5.29177 × 10⁻¹¹ meters (about 0.529 angstroms).



  • Named after physicist Niels Bohr, who introduced the model in 1913.



  • It sets a natural length scale in atomic physics and quantum mechanics.



  • Used to describe atomic sizes and electron orbitals.



Key facts:



  • Bohr radius ≈ 5.29 × 10⁻¹¹ m



  • Represents the typical size of a hydrogen atom’s electron orbit



  • Fundamental to quantum physics and atomic structure



The Bohr radius is essential for understanding atomic dimensions and quantum behavior of electrons.



Foot (US Survey)


The US survey foot is a unit of length used historically in the United States for land surveying and mapping. It is defined as exactly 1200/3937 meters, which is approximately 0.3048006096 meters. This makes it very slightly longer than the international foot, which is exactly 0.3048 meters.


The US survey foot was established to maintain consistency with earlier land surveys and legal descriptions in the U.S. It was used extensively in the Public Land Survey System and other cadastral surveys.


Key points:



  • 1 US survey foot = 1200/3937 meters ≈ 0.3048006096 meters



  • Slightly longer than the international foot by about 0.0006 millimeters



  • Used primarily in land surveying and legal documents



  • As of recent years, the US has been phasing out the US survey foot in favor of the international foot for standardization.



Though nearly identical to the international foot, the US survey foot remains important for understanding older land records and measurements.



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