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3 Feb 2012 09:20:50 IST

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BOHR'S MAGNETON

Physics

WHAT IS BOHR'S MAGNETON?DESCRIBE IT WITH A SUITABLE DEFINITION?

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Viraat Gupta

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9 Mar 2012 23:08:25 IST

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the Bohr magneton (symbol μ_B) is a physical constant and the natural unit for expressing an electron magnetic dipole moment. The Bohr magneton is defined in SI units by

$\mu_\mathrm{B} = {{e \hbar} \over {2 m_\mathrm{e}}}$

and in Gaussian CGS units by

$\mu_\mathrm{B} = {{e \hbar} \over {2 m_\mathrm{e} c}}$

where

e is the elementary charge,

? is the reduced Planck constant,

m_e is the electron rest mass and

c is the speed of light.

The magnitude of an electron's spin magnetic moment is approximately one Bohr magneton.

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