An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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H-beta
  H-بتا  
H-betâ (#)
Fr.: H-beta (Hβ)  

The → Balmer series spectral line of hydrogen which results from → atomic transition between the → energy levels 2 and 4. It has a wavelength of 486.1 nm and falls in the → blue region of the → visible spectrum.

See also: H, symbol of → hydrogen; beta (β), the second letter of Gk. alphabet.