In the previous article: Why Is the Sky Blue . I proposed that the blue sky is transparent (translucent), and the blue sky is just after the sun shines on the earth, and the blue sea water is scattered in the blue reflection formed by the astigmatism in the atmosphere. The atmosphere is a huge transparent spherical concave mirror that surrounds the earth. When the earth's large area of blue sea water is reflected in the atmosphere, the light is evenly reflected throughout the atmosphere according to the principle of concave mirror astigmatism. Since the coverage of this viewpoint is difficult to quantify, it is difficult to implement, but now the developed technology can draw conclusions through simulation experiments. I also said that I am doing LED lighting, and it also involves similar lighting products. Let's do some reference. Figure 1 is a spherical light source of an LED company, which can emit R (red). G (green). B (blue). W (white) f...