An Etymological Dictionary of Astronomy and Astrophysics

English-French-Persian

فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک



relative refractive index
  دیشن ِ شکستی ِ بازانی  
dišan-e šekasti-ye bâzâni
Fr.: indice de réfraction relatif  

The ratio of the sine of the angle of incidence to the sine of the angle of refraction for a ray passing out of one of the media into the other.

See also:relative; → refractive; → index.