先赴上连结 http://ppt.cc/lTTY
第六题
N eletrons move at speed v in a circular orbit of radius R. What is the
magnetic dipole moment associated with the current loop?
这题 I= neV然后直接乘上面积 是吗?
第八题
Yellow light at 587.6nm, characteristic of helium, is found to be redshifted
as it is observed in a certain star; the wavelength is measured to be 611.7 nm
How fast is the star receding form earth?
这题是用光都卜勒的公式然后把频率换成 光速/波长 就得解了吗?
还是有其他要注意的地方?
话说 网络上找不太到102台大普物A的解答
有哪位大哥能提供吗XDD
小弟感激不尽