I understand

In the spring of March when everything revived, I walked on the avenue next to the school. Looking at the green leaves in the book, I suddenly thought: "Why is the leaves green? And the sky and the sea are blue?" I was puzzled.

When I got home, I turned on the computer and looked for color-related information; the color of nature was related to the sun. Sunlight is a complex light, and its visible light is red. Orange. yellow. green. green. blue. Purple seven in the monochromatic light composition. Some objects that are opaque reflect some light and absorb some other monochromatic light. The color of the object is determined by it. For example, red apples only reflect red light and look red; green leaves only reflect green light and look green. The snow is totally reflected in the sun. It looks white. Black absorbs all seven kinds of light. Crystal does not absorb seven kinds of light and is not absorbed, so it is transparent.

The sky is blue because the blue light is very short and is easily exposed to carbon particles in the atmosphere. dust. The water vapor reflects, so the sky we see is blue. After sunset, the sun disappeared and nature entered sleep.

In the original life, there is learning everywhere. As long as you are diligent in discovering and being good at thinking, you will gain something.

Fourth grade: King of the King