应用ABCD定律计算了平面光波经过一个光阑一透镜组合系统的衍射场．应用瑞利散射理论，计算了光与Rayleigh粒子（半径小于波长）的相互作用......

Nonlinear screening of a test charge in plasma by electrons trapped or untrapped is studied. The obtained results are in......