论文部分内容阅读
雨后阳光中呈现的虹,对地面的观察者来说,至多能看到180°的弧带,另外的180°弧是成在地平线之下。对于飞机上的观察者来说,可能看到360°虹。 虹可以分为第一虹和第二虹,第一虹就叫做虹,是由白光从空气进入水滴经折射—反射—折射后射出引起色散而形成的,如图1所示。第二虹也叫做霓,是由白光从空气进入水滴经折射—反射—反射—折射引起色散而形成的,如图2所示。
The rainbow that appears in the sunlight after the rain, for the observer on the ground, can see at most 180° arcs, and another 180° arc is below the horizon. For observers on the plane, 360° rainbows may be seen. The rainbow can be divided into a first rainbow and a second rainbow. The first rainbow is called a rainbow, which is formed by white light entering the water droplets from the air and causing dispersion after refraction-reflection-reflection, as shown in FIG. 1 . The second rainbow, also called neon, is formed by the dispersion of white light from the air into the water droplets through refraction-reflection-reflection-reflection, as shown in Figure 2.