A cup filled with water is the reason for the magnifying glass to be in a hurry

Look at the words through the glass of water, the words are far away (must be laughing Qishu away from the water cup) will be reversed left and right, but the magnifying glass will be reversed up and down the sedan rise, mainly because the water cup is the same thickness up and down, and the magnifying glass is a convex lens (not the same drop, you can understand this if you try it, you may not see it very clearly, but the principle is clear

Actually, I just learned this, and the teacher just talked about it today, so you ran into it, and you were lucky, you were in the second year of junior high school, me, too.

The answer is correct.

Let's do an experiment:

I first took out two clean glasses, filled one of them with clean water, and the other cup did not hold a little water, and then I took out a piece of paper with the words "I started the experiment without excitement", and everything was ready to stop, and the experiment began! I put the cup in front of the paper and looked at it intently, and suddenly, I noticed that the original smaller characters had become larger, and the handwriting was much clearer.

But the experiment is not over, and the conclusions must not be drawn too early. What if both drinking glasses act like magnifying glasses? So, I took the cup with the water and placed the empty cup in front of the paper, and I noticed that the size of the words had not changed.

The answer came out at this moment: the cup filled with water was bigger and clearer.

Please take a closer look: a. The image formed by the plane mirror is symmetrical with the object about the mirror face, and the shirt is large and upright, which is formed by the reflection of the good branches of light, and it is a virtual image, so A is wrong;

b. The size of the image of the mirror is related to the size of the object, and has nothing to do with the distance from the object to the plane mirror, so B is wrong;

c. The water cup in the figure is equivalent to a convex lens, and the image formed by the water cup in the plane mirror is refracted by the water cup to form a reduced real image, which is the same as the imaging principle of the camera, so C is correct;

d, the image formed by the large mirror is like an enlarged virtual image, and it will not be reduced, so the liquid age d is wrong

As soon as I walked into the classroom, I saw that the students were discussing, some were discussing, and some were thinking about it. Why are there so many oddly shaped cups on the table?

When the class started, the teacher gave us all the glasses and pants. I took the cup and put it on the paper to read the words, and the words became clear and small. After a while, the teacher headed for us'Add some water to the cup. The crystal water droplets shine brilliantly under the illumination of the light, which is very dazzling.

So how do you make a homemade magnifying glass? Some students were enthusiastic about it; Some students sat up with their hands and feet neatly; There are also some students who are doing it with their hands and feet. I tilted the water cup a little, and the small water droplets rolled the filial piety, and at this time, the words became clear and huge, which was really surprising.

I looked at the stationery box with a cup, and the pencil was big, fat, like a thick water pipe. The same goes for the eraser, like a delicious flatbread.

But why is that? I'm really puzzled. It turns out that the water drops on the glass, thick in the middle and thin around the perimeter, such an arc is like a small convex lens, when looking at things, because the object distance is very close, it is smaller than the focal length of this convex lens, so that a magnified upright image is formed.

This class is really interesting, don't look at it as common things, but small things have a big truth.