Convert Bohr radius to ell 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.

Ell

An ell is a historical unit of length that was commonly used in medieval Europe, especially for measuring textiles and cloth. Its length varied by region but was typically about 45 inches (approximately 1.143 meters).

The ell originated from the length of the arm or forearm and was often used by tailors and merchants to measure fabric. Different countries had their own versions—for example, the English ell was about 45 inches, while the Scottish ell was longer, around 37 inches.

Although obsolete today, the ell played an important role in trade and clothing production before standardized measurements became widespread.

Summary:

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  1 ell ≈ 45 inches (1.143 meters)

  
  
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  Used mainly for measuring cloth and textiles

  
  
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  Length varied by region and country

  
  

The ell is now largely of historical interest but reflects the origins of many modern measurement systems.