| 释义 |
Van Allen belt
Van Al·len belt V0019000 (văn ăl′ən)n. Either of two toroidal zones containing high-energy ionized particles trapped in Earth's magnetic field and surrounding the planet, beginning at an altitude of about 800 kilometers (500 miles) and extending tens of thousands of kilometers into space.
[After James Alfred Van Allen (1914-2006), American physicist.]Van Allen belt n (Physical Geography) either of two regions of charged particles above the earth, the inner one extending from 2400 to 5600 kilometres above the earth and the outer one from 13 000 to 19 000 kilometres. The charged particles result from cosmic rays and are trapped by the earth's magnetic field [C20: named after its discoverer, J. A. Van Allen]Van Al′len belt` (væn ˈæl ən)
n. either of two atmospheric regions of high-energy charged particles, one at an altitude of about 2000 mi. (3200 km) and the other at from 9000 to 12,000 mi. (14,500 to 19,000 km). [1955–60; after J. A. Van Allen (b. 1914), U.S. physicist] Van Al·len belt (văn ăl′ən) Either of two zones of high-intensity radiation surrounding the Earth. In these zones, a large number of atomic particles with high energies are trapped by the Earth's magnetic field.Thesaurus| Noun | 1. | Van Allen belt - a belt of charged particles (resulting from cosmic rays) above the Earth trapped by the Earth's magnetic fieldearth, globe, world - the 3rd planet from the sun; the planet we live on; "the Earth moves around the sun"; "he sailed around the world" |
Van Allen belt
Van Allen belt either of two regions of charged particles above the earth, the inner one extending from 2400 to 5600 kilometres above the earth and the outer one from 13 000 to 19 000 kilometres. The charged particles result from cosmic rays and are trapped by the earth's magnetic field Van Allen belt
Words related to Van Allen beltnoun a belt of charged particles (resulting from cosmic rays) above the Earth trapped by the Earth's magnetic fieldRelated Words |