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Что (кто) такое échelle Mohs - определение

TYPE OF DIFFRACTION GRATING USED IN SPECTROMETERS

Echelle Grating; Echelle spectrograph; High resolution echelle spectrograph; High-resolution echelle spectrograph; Echelle

Friedrich Mohs

GERMAN GEOLOGIST AND MINERALOGIST (1773-1839)

Carl Friedrich Christian Mohs; Carl Mohs

Carl Friedrich Christian Mohs (; 29 January 1773 – 29 September 1839) was a German chemist and mineralogist. He was the creator of the Mohs scale of mineral hardness.

https://en.wikipedia.org/wiki/Friedrich_Mohs

Mohs scale of mineral hardness

QUALITATIVE ORDINAL SCALE CHARACTERIZING SCRATCH RESISTANCE OF VARIOUS MINERALS

Mohs hardness scale; Mohs Scale; Mohs hardness; Mohs scale of hardness; Mohs' scale of mineral hardness; Hardness scale; Mohs Hardness Scale; Mineral hardness; Moh's scale; Mohs' scale; Moh's Scale; The test for the hardness of minerals; Moh's Scale Of Hardness; Moh's scale of mineral hardness; Mohs's scale of mineral hardness; Mohs Scale of Mineral Hardness; Moh scale; Mohn hardness scale; Moh hardness scale; Mohs scale of mineral hardness

The Mohs scale of mineral hardness () is a qualitative ordinal scale, from 1 to 10, characterizing scratch resistance of various minerals through the ability of harder material to scratch softer material.

https://en.wikipedia.org/wiki/Mohs_scale_of_mineral_hardness

Mohs' scale

QUALITATIVE ORDINAL SCALE CHARACTERIZING SCRATCH RESISTANCE OF VARIOUS MINERALS

Mohs hardness scale; Mohs Scale; Mohs hardness; Mohs scale of hardness; Mohs' scale of mineral hardness; Hardness scale; Mohs Hardness Scale; Mineral hardness; Moh's scale; Mohs' scale; Moh's Scale; The test for the hardness of minerals; Moh's Scale Of Hardness; Moh's scale of mineral hardness; Mohs's scale of mineral hardness; Mohs Scale of Mineral Hardness; Moh scale; Mohn hardness scale; Moh hardness scale; Mohs scale of mineral hardness

[m??z]

¦ noun a scale of hardness used in classifying minerals.

Origin

C19: named after the German mineralogist Friedrich Mohs.

Википедия

Echelle grating

An echelle grating (from French échelle, meaning "ladder") is a type of diffraction grating characterised by a relatively low groove density, but a groove shape which is optimized for use at high incidence angles and therefore in high diffraction orders. Higher diffraction orders allow for increased dispersion (spacing) of spectral features at the detector, enabling increased differentiation of these features. Echelle gratings are, like other types of diffraction gratings, used in spectrometers and similar instruments. They are most useful in cross-dispersed high resolution spectrographs, such as HARPS, PARAS, and numerous other astronomical instruments.

https://en.wikipedia.org/wiki/Echelle grating