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radians
radian
IPA（発音記号）
名詞
(geometry) In the International System of Units, the derived unit of plane angular measure of angle equal to the angle subtended at the centre of a circle by an arc of its circumference equal in length to the radius of the circle. Symbol: rad
日本語の意味
円の中心で、円弧の長さがその円の半径と等しい時に作られる中心角の大きさを示す、国際単位系における平面角の派生単位。記号：rad
英語の意味
(geometry) In the International System of Units, the derived unit of plane angular measure of angle equal to the angle subtended at the centre of a circle by an arc of its circumference equal in length to the radius of the circle. Symbol: rad
関連語
radianspheres
名詞
活用形
複数形
plural of radiansphere
原形:
radiansphere
日本語の意味
「radiansphere」の複数形
英語の意味
plural of radiansphere
radiansphere
名詞
A spherical region of radius λ/2π around a small dipole electromagnetic antenna. This is the distance at which the induction and radiation terms are equal in magnitude. Inside, the induction terms dominate. In radio antenna theory the radiansphere is a convenient definition for the boundary between near-field and far-field regions.
日本語の意味
小さなダイポール電磁アンテナを中心とし、半径λ/2πの球状領域を指す用語。近接界（誘導項が支配的な領域）と遠方界（放射項が支配的な領域）との境界としても定義される。
英語の意味
A spherical region of radius λ/2π around a small dipole electromagnetic antenna. This is the distance at which the induction and radiation terms are equal in magnitude. Inside, the induction terms dominate. In radio antenna theory the radiansphere is a convenient definition for the boundary between near-field and far-field regions.
関連語
