Why does the newspaper become a bulge when I read it?

I think that when you read a newspaper, the newspaper becomes a prominent face, and that's because when you read a newspaper, you can make a special face by folding your hands together.

It must be a person's habit to read the newspaper, using the fingers of both hands to push the newspaper out, so that a convex surface is formed, and if you only hold it and read it like this, the newspaper will not protrude.

Newspaper is paper that is easy to convex and move when you look at it, and the newspaper itself will not be stable but flat.

When reading the newspaper, the leopard becomes a protruding surface, which may be when you often exchange for Fauci, which makes the newspaper deformed.

It is likely that the protrusion is due to something pressing the newspaper when it was placed.

So the newspaper becomes not.

This is difficult for you to understand, when reading the newspaper, isn't he a plane? Do you like to hold your finger down below when you read the newspaper? It shows a convex surface, which may be bad for the eyes.

Because people hold the distance that fits their arms in this way, if they are spreading branches, their hands will be very tired, so they will shorten this distance.

How do you read a newspaper when the newspaper becomes a convex? Sometimes concave, sometimes convex, sometimes flat, it's a matter of holding posture.

This may be due to moisture or water during storage. After drying, it becomes a change in mentality, which is more prominent.

When reading a newspaper, the newspaper becomes a prominent surface, which is caused by the visual selection effect.

I guess look at the map Discoveries from the World Map One day in 1910, young Wegener was hospitalized with an illness. The ward was white and quiet, and even the doctor in the white coat walked lightly. Wegener was bold and active by nature, restless in a quiet and comfortable hospital room, like a trapped beast under house arrest.

He was often patient, staring at the map on the wall. Bore, Wegener stood up and used his index finger to draw the coastlines of the continents on the map, killing the time. He finished painting Oceania and then Antarctica; After painting Africa, I painted South America.

Suddenly, his fingers slowed and stopped on a prominent part of the map in Brazil, South America, but his eyes were fixed on the Gulf of Guinea, recessed at right angles off the west coast of Africa. Look at! The shapes of these two places match so incompatibly!

Wegener was stunned by his stumble discovery! He was in high spirits and carefully observed the differences in the shape of the Americas and the African continents. Sure enough, in every protrusion of Brazil's east coast, similarly shaped bays can be found on the west coast of Africa; At the same time, each of Brazil's bays can find a corresponding protrusion in Africa.

It can't be a coincidence, right? Wegener was so excited that he compared the pieces of land on the map and found that all the continents on Earth fit together well from the similarity of the coastlines. Thus, a new whimsical idea was formed in the young man's mind:

In ancient times, all the landmasses on Earth were connected, and later because of constant drift, they were divided into the various continents of Sakuruma today, and their coastlines coincided amazingly. Early the next morning, he knocked on the door of the famous scientist Professor Coppen and told him about his idea. The professor affirmed that his hypothesis was valid, and said that it had been mentioned before, but there was not enough evidence to prove it.

The professor advised him to dismiss his thoughts and not to waste his thoughts on it. Wegener was not one to change his mind easily. He began to search the continents for contacts and > comparisons, searching for evidence of continental drift in the vast amount of information.

Once, he saw a document that mentioned that there were some similarities between paleontological fossils on the continents of South America and Africa. A reptile called the mesosaurus, found in both eastern Brazil and southwestern Africa, apparently lived on the same continent at the time, otherwise it would have been difficult to fly across the ocean even with wings. This important discovery greatly encouraged him.

He was full of confidence and did a lot of research work. In 1912, at the Geological Society held in Frankfurt, Wegener gave a lecture entitled "The Origin of Continents and Oceans", and put forward the hypothesis of continental drift, which caused a shock in the geological world.

Learn to distract the other person. Take out a newspaper first (preferably a blank piece of paper, otherwise the attentive person will see the pull). Prepare a piece of paper to tear in half, crumple half into a ball and hide it in the palm of your hand, and take out the other half to start the performance.

At the beginning of the performance, first show the other party this piece of paper, and after confirmation, start to tear one by one (don't prompt the other party what you do next, so that the performance is very effective), after tearing it is very broken, it is crumpled into a ball, and put it in the hand that is hiding the paper, okay, at this time, it depends on your performance, use your hands to push the complete paper ball outside, push it outside (the other party still thinks it is a broken paper ball) pretend to blow or something, and then give it to the other party, let him open it himself. In this way, when he opened it, he found that the paper was restored, and it had an effect. Ask the other person to open it, and you'll have time to throw that shredded paper ball away or hide it.

You're talking about tearing up the newspaper and restoring it, I will, this is very complicated, it's a classic stage magic.

This is teaching ... Hope you can understand because it's in English.

When printing and dyeing newspapers, oxygen becomes ozone, which is the unique smell of ozone. In addition to this, it may also be the smell of the printing and dyeing material, if so, then it is best not to wrap food in newspaper, especially cooked food.

If you read the newspaper news, you can put it away and watch it later, but if you watch the TV news, you won't have it.

One for watching, one for listening.

Answer: a

Analysis: Because it is a virtual image, the law of convex lens into a virtual image is: the smaller the object distance, the smaller the image, and the larger the object distance, the larger the image. The larger the viewing angle, the larger the image, and the more you can distinguish the details of the object. Moving closer to an object increases the angle of view, but is limited by the ability of the eye to focus.

Observation method 1: Keep the magnifying glass close to the object to be observed, the object of observation does not move, the distance between the human eye and the object of observation remains unchanged, and then move the hand-held magnifying glass to move back and forth between the object and the human eye until the image is large and clear.

Observation method 2: The magnifying glass is as close as possible to the eyes. The magnifying glass does not move, moving the object until the image is large and clear.

In order to see tiny objects or details of objects, it is necessary to move the object closer to the eye, which can increase the angle of view and create a large real image on the retina. But when the object is too close to the eye, it is impossible to see clearly. In other words, in order to be clear, not only should the object be angled enough to the eye, but also the appropriate distance should be taken.

Obviously, these two requirements are mutually restrictive for the eye, and a convex lens in front of the eye can solve this problem. A convex lens is the simplest magnifying glass, a simple optical instrument that helps the eye observe tiny objects or details.

b Because it is an illusion, then the smaller the distance between objects, the better, and it should be like this!

I just flipped through the book and realized I had made a mistake. I'm sorry! The convex lens is used as a magnifying glass, which is to use the principle that the convex lens can be magnified into a virtual image. Rather, it should be that the larger the object distance (less than double the focal length), the larger the image.

b. Junior high school second grade questions.

I really don't know how to ask the teacher.