Encyclopedia > Bohr radius

Article Content

Bohr radius

In Bohr's model of the hydrogen atom, the Bohr radius (<math>a_0</math>) is the radius of the lowest energy orbit:

<math>a_0 = {{4\pi\epsilon_0\hbar^2}\over{m_e e^2}}</math>

where:

<math>\epsilon_0</math> is the permittivity of vacuum

<math>\hbar</math> is the Planck's constant

<math>m_e</math> is the electron rest mass

and

<math>e</math> is the elementary charge

It has a value of 5.29189379×10^-11 m, or about half an angstrom.

All Wikipedia text is available under the terms of the GNU Free Documentation License

Search Encyclopedia

Search over one million articles, find something about almost anything!

Featured Article

Quackery

... such as cancer are made. (Usually over the internet.) At these institutions, untrained, or immoral, technicians apply all sort of useless treatments. Examples include ...