On a cold evening in November p>1895, on the campus of the University of Wozburg in Germany, a professor was over 5 years old. Walking alone to a laboratory in the Institute of Physics.

He is the principal of the school and the famous physicist Professor Roentgen. Recently, he has been experimenting with an improved cathode ray tube. Because he has many administrative work and teaching tasks during the day. I had to put my own scientific experiment at night.

Professor Roentgen went to the laboratory, first took off his thick coat, put on his work clothes, and sat down beside the experimental platform. I saw that he carefully wrapped a pear-shaped vacuum discharge tube with black paper to prevent any visible light from leaking out of the tube. Then, he stood up, carefully closed all the doors and windows, closed the curtains again, and turned on the power, bending down to check whether the black paper leaked light.

suddenly, he found a strange phenomenon: a green fluorescence was emitted on a small workbench less than 1 meter away from the discharge tube!

"Where did this light come from?" Roentgen thought to himself. He looked around strangely and found nothing. So he cut off the power and the photocell went out. When you look at the green light again, the green light is gone.

Then, he tried several times in succession. As long as the power was turned on and the photocell was on, green light appeared. So he struck a match to see what was on the small workbench.

It turns out that there is a piece of cardboard coated with a layer of crystal material of barium cyanoplatin, which is the source of mysterious light!

"But why can this piece of cardboard shine?" Roentgen is unknown, and he asked himself. "Is it that there is some unknown ray in this photocell that hits the cardboard and causes it to glow?

With this in mind, he picked up a book and put it between the photoelectric cell and the cardboard, trying to prove his inference. To his surprise, this kind of light is not only radiated from the photoelectric tube, but even more strangely, it still shines on the cardboard. He moved the cardboard farther away, and it was still glowing.

"my god! This kind of ray can penetrate solid matter! " Roentgen was ecstatic, unable to restrain his inner excitement and forgot everything around him. He then used wood and hard rubber as obstacles and made repeated experiments. As a result, it was found that these objects could not block the passage of this ray. In this way, unconsciously, it was the next morning.

his wife found him out all night and sent someone to call him for breakfast. His mouth answered, but his hand kept doing experiments. After several urging, he ate a little at random and returned to the laboratory without saying a word.

For several days in succession, he kept himself in the laboratory, and everything outside seemed meaningless to him, so he devoted himself to this nameless ray. He repeatedly experimented with various metals, and as a result, except for copper and platinum, everything else was penetrated by radiation.

One day, he accidentally put his hand between the photoelectric tube and the cardboard, and he was shocked. He clearly saw the outline of each finger and vaguely saw the shadow of his hand bone!

"I'm afraid this is the first time that humans have seen the bones inside the living body!" Roentgen surprised all thought. Calm down, he decided to continue his experiment until he could explain it in theory.

In recent days, people have found something unusual about Professor Roentgen. A person stays in the laboratory without saying a word, often leaving early and returning late, forgetting to eat and sleep, but everyone respects this diligent scientist very much and no one bothers him.

His wife was full of doubts. Seeing his emaciated face and exhausted body, she asked with concern,

"You must make it clear today, what have you been doing in the laboratory these days?"

roentgen smiled and replied lightly, "It's just an ordinary experiment." The wife knows Roentgen very well and knows that he must have great secrets. Out of concern for her husband and her own curiosity, she insists that her husband take her to the laboratory. When the wife saw this phenomenon with her own eyes, she was also very surprised. Roentgen acted according to circumstances and said to his wife,

"Would you like to be the subject of the experiment?"

When the wife saw her husband's serious appearance, she didn't dare to take it as a fun thing, but she reluctantly agreed to it because she wanted to refuse and was afraid of affecting her husband's work.

She carefully followed her husband's arrangement and put her hand on the cassette containing photographic negatives. Roentgen hurriedly turned on the power and irradiated it with a photoelectric cell for 15 minutes. But when he sent the photo to his wife, she trembled and widened her eyes. She couldn't believe that this exposed skeleton turned out to be her rich hand!

This is the earliest X-ray photograph in history. This is the name Roentgen gave to this kind of ray, and until now, people still call it X-ray.

Shortly after that, Roentgen published this kind of ray to the world through his paper "A New Ray".

this incident quickly caused a sensation all over the world. People rushed to tell each other about this great discovery, and Roentgen became a news figure. But besides many congratulations, there are also people who are skeptical about it. What's more, they strongly condemn this, and they believe that this is a blasphemy against the sacred human body.

roentgen dismissed this, and decided to give his first lecture in his own research institute in January of the following year, and gave a live performance. In the report, Roentgen talked excitedly: the discovery of "X" rays will have a great impact on physics, especially human medicine.

there was a storm of applause from the audience. An elderly anatomist said excitedly that this was the most meaningful academic conference he had ever attended. So he led the participants to cheer for Roentgen. It is suggested that this ray be named "Roentgen Ray".

Today, X-rays have been widely used in crystal structure research, metal exploration, medicine and perspective, and brought great benefits to mankind. In recognition of Professor Roentgen's outstanding contribution, the Nobel Prize Foundation decided to award the first year's physics prize to this famous physicist.