X-ray Machine

In 1895, w.c.r & ouml; ntgen, a German physicist, used a sealed glass tube embedded with two metal electrodes (one is called anode, the other is called cathode) to study the phenomenon of gas discharge in cathode-ray tube. He applied tens of thousands of volts of high voltage electricity to both ends of the electrode and used a ventilator to extract air from the glass tube. In order to block the light (a kind of arc light) leakage during high-voltage discharge, a layer of black cardboard is covered on the outside of the glass tube. When he was doing this experiment in a dark room, he happened to find a piece of cardboard soaked in barium platinum cyanide solution emitting bright fluorescence two meters away from the glass tube. In further experiments, cardboard, wooden boards, clothes and books about two thousand pages thick could not block the fluorescence. What's more amazing is that when I took this fluorescent cardboard with my hand, I saw the image of the hand bone on the cardboard.

At that time, roentgen believed that this was a kind of ray that could not be seen by human eyes but could penetrate objects. Because its principle can't be explained and its property is unknown, the "X" which represents the unknown number in mathematics is used as the code, which is called "X" ray (or X-ray or X-ray for short). This is the discovery of X-ray and the origin of its name. The name has been used to this day. In memory of this great discovery of roentgen, later generations named it roentgen ray.

The discovery of X-ray is of great significance in human history. It opens up a new way for natural science and medicine. For this reason, roentgen won the first Nobel Prize in physics in 1901.

High frequency medical diagnostic X-ray machine pld6000

High frequency medical diagnostic X-ray machine pld6000

Science is always developing. Through the repeated practice and research of roentgen and other scientists, the essence of X-ray is gradually revealed, and it is proved that it is a kind of electromagnetic wave with extremely short wavelength and great energy. Its wavelength is shorter than that of visible light (about 0.001-100nm), and the wavelength of X-ray used in medicine is about 0.001. Its photon energy is tens of thousands to hundreds of thousands of times larger than that of visible light. Therefore, in addition to the general properties of visible light, X-ray also has its own characteristics.