1 考えている状況

図: Geometry for caluculation of the radiation field at $R\rt$ from the position of the radiating particle at the retarted time ( $t'=t_{{\rm ret}}$ ).
$\includegraphics[width=14.00truecm,scale=1.1]{jyoukyou.eps}$

$\displaystyle t'$	$\displaystyle = t_{{\rm ret}}$	(1)
$\displaystyle {\bf R}(t')$	$\displaystyle = \vr - \vr_0(t')$	(2)
$\displaystyle R(t')$	$\displaystyle = \left\vert {\bf R}(t')\right\vert$	(3)
$\displaystyle t'$	$\displaystyle = t - \frac{R(t')}{c}$	(4)
$\displaystyle \vn(t')$	$\displaystyle = \frac{{\bf R}(t')}{R(t')}$	(5)
$\displaystyle \kappa(t')$	$\displaystyle = 1-\vn(t')\cdot \bm{\beta}(t')$	(6)

著者: 茅根裕司 chinone_at_astr.tohoku.ac.jp