arg

...The angle between the incident light and the transmitted light is called the argument. Prism (3) Argument (amplitude) of a complex number If the absolute value of the complex number α = a + bi ( a and b are real numbers, i is the imaginary unit) is r , and the angle between the positive direction of the x- axis and the vector is θ, then α can be expressed as α = r (cosθ + i sinθ) (Figure). This is called the polar form of α. ...

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Source | Heibonsha World Encyclopedia 2nd Edition | Information

…この入射光と透過光のなす角を偏角という。プリズム(3)複素数の偏角argument(amplitude)　複素数α＝a＋bi(a,bは実数，iは虚数単位)の絶対値をr,x軸の正の方向とベクトルのなす角をθとすれば，αは，　α＝r(cosθ＋isinθ)と表される(図)。これをαの極形式という。…

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出典｜株式会社平凡社世界大百科事典 第２版について | 情報