三年前,人们发现一种奇怪的光,这种光与普通光源所发出来的光完全不同。我们知道,一道普通光源发出来的光,是向四面八方发射的,并没有一个特殊的发光方向。而且普通光源发出来的光包括着许多波长,也就是说并不具有“单色性”。还有,普通光源的光并不是“相干”的,所谓“相干性”,粗略的说来,是光在传播中,通过空间一个固定点时,在相同的时间间隔内,通过这固定点的光波的形状都相同,也就是说,光波在传播中完全是同步的。最后,普通光源发出来的光是弱光。但是,和普通光不同,这种新型的光却具有上述的普通的光所没有的性质。这种新型的光是 Three years ago, people found a weird light, which is completely different from the light emitted by ordinary light sources. We know that the light from an ordinary light source is emitted in all directions and does not have a special light-emitting direction. And ordinary light source to emit light includes many wavelengths, that is to say does not have “monochromatic”. Also, the ordinary light source is not “coherent”, the so-called “coherence”, roughly speaking, is the light in the spread through a fixed point in space, at the same time interval, through the fixed point of The shape of the light waves are the same, that is, the light waves are completely synchronized in their propagation. Finally, the light from ordinary light sources is weak light. However, unlike ordinary light, this new type of light has properties that ordinary light does not have. This new type of light is