徐珊珊11
During 1895 Röntgen was investigating the external effects from the various types of vacuum tube equipment — apparatus from Heinrich Hertz, Johann Hittorf, William Crookes, Nikola Tesla and Philipp von Lenard — when an electrical discharge is passed through them. In early November he was repeating an experiment with one of Lenard's tubes in which a thin aluminium window had been added to permit the cathode rays to exit the tube but a cardboard covering was added to protect the aluminium from damage by the strong electrostatic field that is necessary to produce the cathode rays. He knew the cardboard covering prevented light from escaping, yet Röntgen observed that the invisible cathode rays caused a fluorescent effect on a small cardboard screen painted with barium platinocyanide when it was placed close to the aluminium window. It occurred to Röntgen that the Hittorf-Crookes tube, which had a much thicker glass wall than the Lenard tube, might also cause this fluorescent effect.In the late afternoon of 8 November 1895, Röntgen determined to test his idea. He carefully constructed a black cardboard covering similar to the one he had used on the Lenard tube. He covered the Hittorf-Crookes tube with the cardboard and attached electrodes to a Ruhmkorff coil to generate an electrostatic charge. Before setting up the barium platinocyanide screen to test his idea, Röntgen darkened the room to test the opacity of his cardboard cover. As he passed the Ruhmkorff coil charge through the tube, he determined that the cover was light-tight and turned to prepare the next step of the experiment. It was at this point that Röntgen noticed a faint shimmering from a bench a meter away from the tube. To be sure, he tried several more discharges and saw the same shimmering each time. Striking a match, he discovered the shimmering had come from the location of the barium platinocyanide screen he had been intending to use next.Röntgen speculated that a new kind of ray might be responsible. 8 November was a Friday, so he took advantage of the weekend to repeat his experiments and make his first notes. In the following weeks he ate and slept in his laboratory as he investigated many properties of the new rays he temporarily termed X-rays, using the mathematical designation for something unknown. Although the new rays would eventually come to bear his name in many languages where they became known as Röntgen Rays, he always preferred the term X-rays. Nearly two weeks after his discovery, he took the very first picture using x-rays of his wife's hand, Anna Bertha. When she saw her skeleton she exclaimed "I have seen my death!"The idea that Röntgen happened to notice the barium platinocyanide screen misrepresents his investigative powers; he had planned to use the screen in the next step of his experiment and would therefore have made the discovery a few moments later.[vague]At one point while he was investigating the ability of various materials to stop the rays, Röntgen brought a small piece of lead into position while a discharge was occurring. Röntgen thus saw the first radiographic image, his own flickering ghostly skeleton on the barium platinocyanide screen. He later reported that it was at this point that he determined to continue his experiments in secrecy, because he feared for his professional reputation if his observations were in error.Röntgen's original paper, "On A New Kind Of Rays" (Über eine neue Art von Strahlen), was published 50 days later on 28 December 1895. On 5 January 1896, an Austrian newspaper reported Röntgen's discovery of a new type of radiation. Röntgen was awarded an honorary Doctor of Medicine degree from the University of Würzburg after his discovery. He published a total of three papers on X-rays between 1895 and 1897. Today, Röntgen is considered the father of diagnostic radiology, the medical specialty which uses imaging to diagnose disease.
ABCDG，43668
威廉·康拉德·伦琴(德语:Wilhelm Röntgen，1845年3月27日-1923年2月10日)，德国物理学家。1895年11月8日发现了X射线，为开创医疗影像技术铺平了道路 ，1901年被授予首次诺贝尔物理学奖 。这一发现不仅对医学诊断有重大影响，还直接影响了20世纪许多重大科学发现。例如安东尼·亨利·贝克勒尔就因发现天然放射性，与居里夫妇共同获得1903年的诺贝尔物理学奖。到今天，为了纪念伦琴的成就，X射线在许多国家都被称为伦琴射线，另外第111号化学元素Rg也以伦琴命名 。
yanrongsun
X-ray
读音：英[ˈeks reɪ]，美[ˈeks reɪ]
释义：
（1）n. X光照片
（2）v. 照X光
词汇搭配：
do（make，take）an X-ray 拍X光（片）
put sb under the X-ray 对某人进行X光透视
X-ray chest 给胸部做X光检查
扩展资料
近义词
1、roentgenogram
读音：英 ['rɒntgənəgræm]，美 ['rentgənəˌgræm]
释义：n. X伦琴射线照相；光照相；X射线照片
短语：
conventional roentgenogram 常规X线摄片
completed Roentgenogram 完成仑琴射线照片
roentgenogram X 射线照片
2、scotograph
读音：英 ['skɒtəgrɑːf]，美 ['skɒtəgrɑːf]
释义：n. 射线照片；盲人写字器；暗室显影片
短语：scotograph X 射线照片
优质英语培训问答知识库
