The method can confirm the Gaussian distribution of optical intensity for the fundamentaltransversemode of the He-Ne laser and determine the size of its light spot.
这种方法能够证实氦氖激光基横模的光强分布是高斯分布，能够确定光斑的大小。
2
There are two kinds of fundamental content structures of science course, and they are longitudinal mode and transverse mode.