“J.J” Thompson’s Backround and Interesting Facts!! By: Caroline Ratliff

1. “J.J” Thompson’s Backround and Interesting Facts!! By: Caroline Ratliff

2. Sir Joseph John “J.J.” Thompson was born on December 18th (MY BIRTHDAY!!!), in 1856. He was born in Cheetham Hill, Manchester in England.

3. In 1870 he studied Engineering at the University of Manchester. • In 1876 he transferred colleges and went to Trinity College in Cambridge. • In 1880 he received his Bachelors Degree in Mathematics, and in 1883 got his Masters. • In 1884 Joseph became a Professor of Physics at Cambridge.

4. In 1890 He married Rose Elisabeth, who was a daughter of another Professor of Physics at Cambridge. • Together, they had one son and one daughter.

5. Interesting Facts!! • I think one of Thompson’s greatest contributions for modern science was his role as a teacher because seven of his research assistants and his son won Nobel Prizes in Physics. • His son won a Nobel Prize in 1937 for proving the wavelike properties of electrons. • Won a Nobel prize in 1906 • He was appointed to the Order of Merit 1912 • Order of Merit is a British and Commonwealth Order given by the monarch. It is to recognize service in the armed forces, science, art, literature, or for the promotion of culture. • In 1914 he gave the Romanes Lecture in Oxford on “The atomic theory”. • The Romanes Lecture is a prestigious lecture given annually at the theatre in Oxford.

6. He was a Noble Peace Prize winner for- • Physics • Discovery of the electron • For his work on the conduction of electricity in gases.

7. He became Master of Trinity College in 1918 and remained there until he died. • Joseph Thompson died on August 30th. He was 44 years old. • He was buried close to Isaac Newton.

8. J.J. Thompson’s Experiments By: Danielle Forest

9. Do atoms have parts? J.J. Thompson suggested that they do. He advanced the idea that cathode rays are really streams of very small pieces of atoms. Three experiments led him to this…

10. In 1897, J. J. Thomson dramatically changed the modern view of the atom with his discovery of the electron. Thomson's work suggested that the atom was not an "indivisible" particle as John Dalton had suggested but, a jigsaw puzzle made of smaller pieces.

11. Thomson’s 1st ExperimentThompson invented the cathode ray tube to bend the rays with a magnet to separate the charges and measure them with an electrometer located at the end of the split tube. The cathode ray failed.

12. Thompson’s 2nd experimentThe last experiment failed due to gas in the tubes, so JJ thought if he extracted the gas the current may bend then allowing him to measure the electrical charge. • Schematic drawing of Thomson's apparatus in the second experiment. Rays from the cathode (C) pass through a slit in the anode (A) and through a slit in a grounded metal plug (B). An electrical voltage is established between aluminum plates (D and E), and a scale pasted on the outside of the end of the tube measures the deflection of the rays.

14. Thompson’s 3rd experiment • Thompson invented this in the thought of determining the basic properties of particles. So because he could not measure the mass of the electrical charge, he could measure how much they bent by a magnetic field and how much energy the carried. From this he could develop a ratio of mass of particles to electrical charge. Rays originate at the cathode on the left and pass through a slit in the anode into a bell jar containing gas at low pressure. The deflected paths of the rays are photographed against a ruled glass plate.

15. J.J. ThompsonMEDALS/AWARDS By: Kaela Kaminski

17. Nobel Prize 1906 • “In recognition of the great merits of his Theroretical and experimental investigations on the conduction of electricity by gases”

19. Hughes Medal 1902 • “An original discovery in the physical sciences particularly electricity and magnetism or their applications”

21. Copley Medal 1914 • England’s highest and oldest award • 1 of 10 that alternated between physical and bio science.

23. Royal Medal 1894 “The Queen’s Medals”