单词 | solid angle |
例句 | For the record, the amount of extra light they found bouncing around the universe is about 10 nanowatts per square meter per steradian, a measure of solid angle on the sky. Outer Space Just Got a Little Brighter 2020-12-08T05:00:00Z The combination of the subdetectors provides particle energy and momentum measurements, together with electron, muon, and photon identification, over more than 98% of the solid angle. [Article] A Particle Consistent with the Higgs Boson Observed with the ATLAS Detector at the Large Hadron Collider 2012-12-20T21:55:01.327Z The miniature solid angle also recurs in the central quartering. Mohave Pottery 2012-04-26T02:00:09.420Z Six of these squares joined together formed eight solid angles, each produced by three plane right angles: and the shape of the body thus formed was cubical, having six square planes for its surfaces.” Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 8 "Cube" to "Daguerre, Louis" 2012-01-31T03:00:17.257Z Replacing by single planes or groups of planes all the similar edges or solid angles of a figure called the “primitive form” he derived other related forms. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7 "Crocoite" to "Cuba" 2012-01-22T03:00:24.397Z There is no telling what the web and rivets would have borne had not the solid angle irons given way at the first bend. Scientific American Supplement, No. 648, June 2, 1888. 2011-12-26T03:00:15.410Z Every solid angle is contained by plane angles, which are together less than four right angles—has no analogous theorem in the plane. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 6 "Geodesy" to "Geometry" 2011-09-19T02:00:10.473Z Definition.—The solid angle subtended by any surface at a point is measured by the quotient of its apparent surface by the square of its distance from that point. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3 "Electrostatics" to "Engis" 2011-02-06T03:00:53.093Z A solid angle is that which is made by more than two plane angles meeting in one point and not lying in the same plane, as the angle of a cube. The New Gresham Encyclopedia. Vol. 1 Part 2 Amiel to Atrauli A cube, for instance, is referred to Plan 1, an axis ending in the center of each face; while in a regular octohedron an axis ends in each solid angle. An Elementary Study of Chemistry At all events, it has the advantage of communicating directly with both the rivers, by whose junction the Sungum, or solid angle, is formed. The Lieutenant and Commander Being Autobigraphical Sketches of His Own Career, from Fragments of Voyages and Travels The solid angles themselves are not necessarily equal, for they may be only symmetrical like the right hand and the left. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 6 "Geodesy" to "Geometry" 2011-09-19T02:00:10.473Z Of the solid angles there are two opposite to one another, such as C and E, which are each composed of three equal obtuse plane angles. Treatise on Light A solid angle is definable as the space contained by three or more planes intersecting in a common point; it is familiarly represented by a corner. Encyclopaedia Britannica, 11th Edition, Volume 2, Part 1, Slice 1 For it has twenty solid angles, each of which is contained by three obtuse planes, and each of these contains one and the fifth part of a right angle. Complete Works of Plutarch — Volume 3: Essays and Miscellanies The second solid is composed of the same triangles, which unite as eight equilateral triangles, and make one solid angle out of four plane angles—six of these angles form a regular octahedron. Timaeus These give the solid angles of the tetrahedron, the octahedron and the icosahedron. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 6 "Geodesy" to "Geometry" 2011-09-19T02:00:10.473Z Hence it is possible to form a solid angle with three, four or five regular triangles or faces. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 6 "Geodesy" to "Geometry" 2011-09-19T02:00:10.473Z Hence three will form a solid angle, that of the cube, and four will not. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 6 "Geodesy" to "Geometry" 2011-09-19T02:00:10.473Z If a solid angle be contained by three plane angles, any two of them are together greater than the third. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 6 "Geodesy" to "Geometry" 2011-09-19T02:00:10.473Z And the third body is made up of 120 triangular elements, forming twelve solid angles, each of them included in five plane equilateral triangles, having altogether twenty bases, each of which is an equilateral triangle. Timaeus Three regular polygons of six or more sides cannot form a solid angle. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 6 "Geodesy" to "Geometry" 2011-09-19T02:00:10.473Z Pascal’s Theorem.—If a solid angle of six faces be inscribed in a cone of the second order, then the intersections of opposite faces are three lines in a plane. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 6 "Geodesy" to "Geometry" 2011-09-19T02:00:10.473Z Brianchon’s Theorem.—If a solid angle of six edges be circumscribed about a cone of the second order, then the planes through opposite edges meet in a line. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 6 "Geodesy" to "Geometry" 2011-09-19T02:00:10.473Z In the plane we may draw polygons; and in the pencil or in the point, solid angles, and so on. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 6 "Geodesy" to "Geometry" 2011-09-19T02:00:10.473Z Each of the four solid angles in this figure is a little larger than the largest of obtuse angles. Timaeus |
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