To be a man must have a beginning and an end, and you can't give up halfway. When we start talking about shadows, we can't stop there. I don't know how many times we can do it, but at least three times! Last time we talked about the difference between light and shadow and mirror shadow, this time we will talk about the intersection of shadows. Remember the first time, we mentioned shadow interference. However, interference is not the same as intersecting. Due to the lack of experiments, I don't know if the intersection is caused by interference. That's not something we're going to consider, though. However, I would like to digress a bit here. Did you know? The mass of a person is only a few kilograms. What! How many kilograms? That's right, that's it. It's the static quality of man, though. However, it doesn't seem right. So, what's the rest of the mass? It turned out to be the quality of movement. However, people don't exercise much, and why is the quality of exercise so great? It turns out that the particles in the human body are moving. So, strictly speaking, a few kilograms is actually the total resting mass of particles in the human body. Now that we're done, let's get started. Mizukawa rarely said something off-topic, which is really surprising.

Although the notebook does not intersect with the shadow of the table when placed on the table, the table will make the shadow of the notebook smaller.

When the wind came, I thought that the shadow of the table and the shadow of the notebook intersected and interfered. The whole process takes no more than a second, so it is impossible for a person to notice that it is happening. But, in fact, it exists. Are you trying to say that when object B is on top of object A, and object C is on top of object B? So, there will be a shadow intersection between object B and object C? Actually, it depends on the situation here. If object A is a bearing object, such as a table. Then your conclusion is correct. If not, then objects A and B and C will all intersect with shadows.

Let me now share my conclusions. First, if an object is suspended in the air, we can get its umbra. However, the shadow intersect still exists. Why? Because as long as the object is not in a vacuum, then the shadows of other objects must affect the shadows of the objects. And intersection is one of those effects. Second, as long as the distance between the two objects exceeds their longest line, the shadow intersection will not occur. The longest line has varying degrees of theoretical value in filtration and sieving things as well as in accumulation, and it is a good theoretical tool. The longest line is the length limit that represents the shape of the object, and can usually be considered as the shape limit value of the object. We know that shadows are limited by the geometry of an object. It is important to note that I am referring to the shortest distance. Because two objects have geometric shapes. The distance between two different points is different, and the distance is many. However, there must be a minimum distance.

Margarita, how can you say it's the shortest distance? In my opinion, it should be the longest distance.

Duenias, I can't explain this question. Let's do an experiment. After Margarita finished speaking, she found the materials. After a few minutes, the experiment is complete. And the facts prove that Yin should indeed be the shortest distance. Dueñas had to admit that he was wrong, and then he began to talk about the conclusions he had reached. Shadow intersecting is really about accumulation. Since the shadow is not a real existence, the essence of the accumulation is not reflected. The intersection of shadows fully says that the shadows are actually three-dimensional, not two-dimensional. The shadow in the mirror is the best proof. Second, if two objects are at the same angle to the light source, and there is no contact between them, then they do not intersect!

Everyone spoke very well and it was an eye-opener for me. A conclusion that can be so easily reached, behind who did not spend a lot of time! Of course, there are sometimes flaws in the conclusions. In the course of the discussion, everyone has to find vulnerabilities for each other. In order to make our conclusions more complete and universal, to achieve the right purpose. ……。