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 : area
area
  پهنه   
pahné (#)

Fr.: aire   

A particular extent of space or surface; the scope of a concept, operation, or activity.

The etymology is not clear; perhaps akin to L. arere "to be dry" → arid.

Pahné "area, field," from pahn "broad, wide" (Mid.Pers. pah(a)n, Av. pathana- "broad, wide, spacious," probably related to perethav- "broad, wide," Skt. prthav-, Gk. platus; PIE *plat- "to spread") + noun forming suffix .

coherence area
  پهنه‌ی ِ همدوسی   
pahne-ye hamdusi

Fr.: zone de cohérence   

Of an electromagnetic wave, the area of a surface perpendicular to the direction of propagation, over which the electromagnetic wave maintains a specified degree of coherence.

coherence; → area.

collecting area
  پهنه‌ی ِ گرد‌آور   
pahne-ye gerdâvar

Fr.: surface collectrice   

Of an interferometric telescope made up of several mirrors, the hypothetical mirror created by the combination of the individual mirrors.

collect; → area.