An Etymological Dictionary of Astronomy and Astrophysics
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فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory

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Number of Results: 3 Search : incident
coincident
  برهم‌افتان، هم‌افتان   
barhamoftân

Fr.: coïncident   

Occupying the same area in space or happening at the same time. Of two geometric figures, matching point for point.

From Fr. coincident, from M.L. coincident-, coincidens, pr.p. of coincidere, → coincide.

coincide.

incident
  فتان   
fotân

Fr.: incident   

1) An instance of something happening; an event or occurrence.
2a) Likely or apt to happen.
2b) Falling or striking on something, as light rays or a beam of particles.

incidence.

Fotân, agent noun and adj. from fotâdan, → incidence.

incident ray
  پرتو ِ فتان   
partov-e fotân

Fr.: rayon incident   

The → light ray that strikes a surface before → reflection, → refraction, or → absorption. Opposite of → emergent ray.

incident; → ray.