Convert Bohr radius to barleycorn Online | Free Length Converter

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.

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

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

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

  
  
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  Used to describe atomic sizes and electron orbitals.

  
  

Key facts:

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  Bohr radius ≈ 5.29 × 10⁻¹¹ m

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

  
  
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  Fundamental to quantum physics and atomic structure

  
  

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

Barleycorn

A barleycorn is an old English unit of length, traditionally based on the length of a grain of barley. It is defined as exactly 1/3 of an inch or approximately 8.47 millimeters.

Historically, the barleycorn was used for measuring small lengths and was also the basis for the inch, which was originally considered to be three barleycorns long. It played a role in various traditional measurements, including shoe sizing in English-speaking countries, where shoe sizes were sometimes expressed in barleycorn units.

Although obsolete as a formal unit, the barleycorn remains culturally significant, especially in shoe sizing systems.

Summary:

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  1 barleycorn = 1/3 inch ≈ 8.47 mm

  
  
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  Based on the length of a grain of barley

  
  
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  Used historically in small measurements and shoe sizing

  
  
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  Mostly of historical and cultural interest today