An Etymological Dictionary of Astronomy and Astrophysics

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beam splitter

فاقگر ِ تابه

fâqgar-e tâbé

Fr.: lame séparatrice

A partially reflecting mirror which permits a part of the light beam to pass through and reflects the rest.

→ beam; splitter, from to split, from M.Du. splitten, from P.Gmc. *spl(e)it-, PIE *(s)plei- "to split, splice."

Fâqgar, from fâq "split, breach, division" + tâbé→ beam.

An Etymological Dictionary of Astronomy and Astrophysics
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