An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian

An opening along the spherical body of a dome through which an optical telescope can observe.

→ dome; → slit.

A pair of adjacent holes or slits made on a dark and plane surface, used in optical experiments, such as interference and diffraction.

→ double; → slit.

An experiment of → diffraction and → interference of two light beams using a → double slit; → Young's experiment.

→ double; → slit; → experiment.

A thin slit in an opaque screen by which light enters a spectrograph.

→ entrance; → slit.

The long opening in the dome of a telescope through which observation is conducted.

Observing, noun of → observe; → slit.

A long, thin opening in a spectrograph allowing only the light studied to fall on the prism.

O.E. slitan "to cut or tear up, slit;" cf. O.S. slitan, O.N. slita, M.L.G., M.Du. sliten, Du. slijten, O.H.G. slizan, Ger. schleißen "to slit."

Šekâf "slit," from Mod./Mid.Pers. škâf- škâftan "to split, burst;" Proto-Iranian *kap-, *kaf- "to split;" cf. Gk. skaptein "to dig;" L. cabere "to scratch, scrape," P.Gmc. *skabanan (Goth. skaban; Ger. schaben; E. shave). PIE base *(s)kep- "to cut, to scrape, to hack."

A type of spectrograph that uses a slit to provide resolution.

→ slit; → spectrograp.

The width size of the slit which determines the spectral resolution of a spectrograph.

→ slit; → width.