“halo”的概念、定义、翻译、参考文献-科学参考

halo

Physics

1. A luminous ring that sometimes can be observed around the sun or the moon. It is caused by diffraction of their light by particles in the earth’s atmosphere; the radius of the ring is inversely proportional to the predominant particle radius.

2. Broad rings appearing in the electron diffraction, neutron diffraction, or X-ray diffraction patterns of materials that are not crystals. For example, the halo associated with neutron diffraction is called a neutron halo. Haloes of this type occur in gases and liquids as well as in noncrystalline solids.

3. The glow in a cathode-ray tube that briefly remains after the beam has passed.

Chemistry

A broad ring appearing in the electron diffraction, neutron diffraction, or X-ray diffraction patterns of materials that are not crystals. Haloes of this type occur in gases and liquids as well as in noncrystalline solids.

Electronics and Electrical Engineering

See halation.

Geology and Earth Sciences

Rainbow-coloured, sometimes white, ring around the Sun or Moon, subtending an angle of 22° or, more rarely, 46°, due to refraction by ice crystals when thin cirrus cloud obscures the luminary. Compare corona.

Geography

A ring of light around the sun or, more rarely, the moon, caused by the refraction of light by ice crystals. A cloud halo is a zone of increased humidity around cumulus clouds; see Lu et al. (2002) J. Appl. Met. 41, 8.

单词	halo
释义	halo Physics 1. A luminous ring that sometimes can be observed around the sun or the moon. It is caused by diffraction of their light by particles in the earth’s atmosphere; the radius of the ring is inversely proportional to the predominant particle radius. 2. Broad rings appearing in the electron diffraction, neutron diffraction, or X-ray diffraction patterns of materials that are not crystals. For example, the halo associated with neutron diffraction is called a neutron halo. Haloes of this type occur in gases and liquids as well as in noncrystalline solids. 3. The glow in a cathode-ray tube that briefly remains after the beam has passed. Chemistry A broad ring appearing in the electron diffraction, neutron diffraction, or X-ray diffraction patterns of materials that are not crystals. Haloes of this type occur in gases and liquids as well as in noncrystalline solids. Electronics and Electrical Engineering See halation. Geology and Earth Sciences Rainbow-coloured, sometimes white, ring around the Sun or Moon, subtending an angle of 22° or, more rarely, 46°, due to refraction by ice crystals when thin cirrus cloud obscures the luminary. Compare corona. Geography A ring of light around the sun or, more rarely, the moon, caused by the refraction of light by ice crystals. A cloud halo is a zone of increased humidity around cumulus clouds; see Lu et al. (2002) J. Appl. Met. 41, 8.
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