1 / 13

Joseph John Thomson Jeff Williams Mrs. Mason Chemistry 03/15/01 Period 6

Joseph John Thomson Jeff Williams Mrs. Mason Chemistry 03/15/01 Period 6

Ava
Download Presentation

Joseph John Thomson Jeff Williams Mrs. Mason Chemistry 03/15/01 Period 6

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Joseph John ThomsonJeff WilliamsMrs. MasonChemistry03/15/01Period 6

  2. Joseph John Thomson was born on December 18, 1856 in Cheetham Hill, a suburb of Manchester, England. When J.J. was fourteen he entered Owens College and took some experimental physics courses. He then entered Cambridge University, on a scholarship, where he would remain involved with the university until his death on August 30, 1940 • Interviewer; Question #1: Were you ever married and/or have any children? • J.J.: Yes I was married to Rose Elizabeth Paget and I had two children one son, George Paget Thomson, who also became a physicist, like myself, and a daughter Joan Paget Thomson, whom accompanied me to many of my speeches and lectures.

  3. Interviewer; Question #2: Where did you meet miss Rose Paget?J.J.: I met Miss Rose Paget, my future wife, at Cavendish Laboratory while I was experimenting in the lab on electromagnetism and atomic particles. Rose was experimenting on soap films in the lab abd attended some of my lectures at the university.

  4. Interviewer; Question #3: What was the Cavendish Laboratory?J.J.: James Clerk Maxwell founded the Cavendish Laboratory in 1871. James was also, obviously, the first professor in the lab. I was the third professor chosen after Lord Rayleigh.

  5. Interviewer; Question #4: Why were you so highly accepted at Cavendish Laboratory?J.J.: I entered Trinity College in 1876, I became a Fellow of Trinity College in 1880 where I finished second in my class. I was Second Wrangler and Second Smith’s Prizeman and became Lecturer in 1883 and then I was accepted at Cavendish Laboratory.

  6. Interviewer; Question #5: What is a cathode ray tube and how does it work?J.J.: A cathode ray tube is a glass tube with wires embedded in opposite ends. You put a high voltage across the wires, pumped out most of the air and the interior of the tube would glow in lovely patterns.Interviewer; Question #6: What was the controversy surrounding the cathode ray tube?J.J.: All the German physicists thought that the visible rays were produced by ether a weightless substance thought to pervade space. British and French physicists thought the rays were electrified particles.

  7. Interviewer; Question #7: How did you stop this controversy?J.J.: I applied a new improved vacum technique to the tube, which created a convincing argument that the rays were composed of particles. Also these rays seemed to be made of the same particles, which I called corpuscles.

  8. Interviewer; Question #8: Throughworking with all these results did you put any information you obtained into mathematical use?J.J.: Yes I did. I took the mass of a certain particle to its electric charge. I could then measure how much the ray would be affected by a magnetic field.

  9. Interview; Question #9: In determining if atoms were made up of smaller parts I have learned that you conducted three experiments what was the first?J.J.: I built a cathode ray tube with a pair of metal cylinders with a slit in them. These cylinders were also connected to an electrometer, a device for catching and measuring electrical charge.

  10. Interview; Question #10: What experiments followed? J.J.: I thought of a new way to bend cathode rays by surrounding it by a conductor. I suspected that the traces were reacting with the gases still remaining in the tube. I extracted all the gas out of the tube I possibly could and the cathode ray did bend. Also on the third experiment which I previously explained by determining the distance a cathode ray would bend by the equation I thought of.

  11. Interviewer; Question # 11: Mr. Thomson, can you explain what you found an electron to be. J.J. : Well through all my years researching and experimenting I have concluded a corpuscle ( electron ) is a tiny part of an atom in fact it is hundreds of times smaller than an atom. I think these negatively charged corpuscles swarm around a cloud of positive charges.

  12. Interviewer; Question # 12: Mr.Thomson you are a very decorated man please speak of some of the awards you won. J.J.: Well I don’t really like to brag but a few of the awards I have won are: the Order of Merit in 1912, I was chosen as the Master of my college, Trinity, and my greatest achievement is the Noble Prize in 1906 for my work with the corpuscles.Interviewer: Also Mr.. Thomson would later become known as the “grandfather of the electron.”

  13. Works Cited1. Http://www.aip.prg/history/electron/jjthomson.htm2.Http://www.britannica.com/bcom/eb/article/8/0,5716/74088+2+72205,00.html3. Http://www.nmsi.ac.uk/on-line/electron/section2/discovery.html4. Http://www.aip.org/history/electron/jj1897.htm5. Http://www.nobel.se/physics/laureates/1906/thomson-bio.html6. Http://www.dbhs.wvusd.k12.ca.us/atomicstucture/disc-of-electron-intro.html

More Related