几道SAT2物理题（英文）,1、In the Rotherford scattering experiments,the trajectory（轨道）of the alpha particles was in the shape of a(an):A.hyperbola（双曲线）B.parabola（抛物线）C.ciecleD.ellipse（椭圆）E.straight line

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几道SAT2物理题（英文）,1、In the Rotherford scattering experiments,the trajectory（轨道）of the alpha particles was in the shape of a(an):A.hyperbola（双曲线）B.parabola（抛物线）C.ciecleD.ellipse（椭圆）E.straight line
几道SAT2物理题（英文）,
1、In the Rotherford scattering experiments,the trajectory（轨道）of the alpha particles was in the shape of a(an):
A.hyperbola（双曲线）
B.parabola（抛物线）
C.ciecle
D.ellipse（椭圆）
E.straight line

几道SAT2物理题（英文）,1、In the Rotherford scattering experiments,the trajectory（轨道）of the alpha particles was in the shape of a(an):A.hyperbola（双曲线）B.parabola（抛物线）C.ciecleD.ellipse（椭圆）E.straight line
因为正电荷相互排斥,只能无限接近,不能接触,接近到一定程度后,电荷间的库仑力增大,使α粒子的轨道改变方向,它的轨迹便近似于双曲线

这不是卢瑟福的散射实验吗,我已经忘的差不多了,
看看这篇文档吧http://wenku.baidu.com/view/249dd8a0284ac850ad024259.html

在卢瑟福散射实验中，α粒子轨迹的形状是一个：双曲线。
详细分析请参考：http://wenku.baidu.com/view/006b1d2e0066f5335a8121b1.html

圆或者椭圆是绝对不可能的，不解释
因为原子中间有原子核带正电，alpha粒子是氦核啊，也带正电，两者存在斥力，不可能是直线啦

完全不用，只要把最常见的几个，金属元素，卤族元素和几个常用的金属元素记住就可以了。只有考AP的时候才需要记住所有的。

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