An Etymological Dictionary of Astronomy and Astrophysics

English-French-Persian

فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

Homepage  Preliminaries  Abbreviations  Acknowledgments  References 
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
natural line broadening
  پهنش ِ زاستاری ِ خط  
pahneš-e zâstâri-ye xatt
Fr.: élargissement naturel de raie  

The broadening of any spectral line due to the fact that excited levels have mean lives, which, by virtue of the uncertainty principle, implies a spread in the energy values.

See also: → natural; → line;
→ broadening.