An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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emergent ray
  پرتو ِ زمرچنده  
partow-e zomarcandé
Fr.: rayon émergent  

Optics: The → light ray leaving a → medium, in contrast to the → incident ray. If the medium has parallel sides, → angle of incidence and → angle of emergence</i are equal as emergent ray and incident ray are parallel to each other.

See also: → emergent; → ray.