Why do the sun's wisteria appear to be low when the sun is high and high when the sun is low?
When you saw the rainbow, do you remember which direction it was coming from?
Niji will always be visible in the sky opposite the sun. In the evening, they are visible in the eastern sky.
The rainbow appears after the rain. At that time, there are many small particles of water in the air. When the sun's rays hit these water droplets, the light bounces off the droplets or bends them and comes out toward the viewer, which is when you see the rainbow.
When sunlight hits a raindrop, light entering the raindrop is reflected or bent, as shown in the figure. The angle between the incoming light and the outgoing light is about 42 degrees. (For red light. The light in the murasaki is at an angle of about 40 degrees)
When the sun is low in the sky, as it is in the morning or evening, the raindrops are high in the sky where the light entering the human eye comes out at a 42 degree angle. Therefore, the rainbow appears to be high in the sky.
During the daytime the sun is high in the sky. At this time, the raindrops that emerge at an angle of 42 degrees are low in the sky. This is why the raindrops that emerge when the sun is high appear low in the sky.
The colors of the rainbow are arranged in a certain way. Red is at the outer edge, followed by orange, yellow, green, blue, ai, and purple at the inner edge.
