Nobody downloaded yet

Discovery of electrons(J,J Thomson) - Essay Example

Comments (0) Cite this document
He later moved to Cambridge to study Mathematics and in 1884 he became the Cavendish Professor of Physics and was also appointed as the Head of the Cavendish laboratory (Science Museum , 2015)…
Download full paperFile format: .doc, available for editing
GRAB THE BEST PAPER98.2% of users find it useful
Discovery of electrons(J,J Thomson)
Read TextPreview

Extract of sample
"Discovery of electrons(J,J Thomson)"

Download file to see previous pages Cathode rays were an enigma during the late 1800s. Many Europeans thought that the rays emitted at the cathode in the discharge tube were an ethereal disturbance, like light. Crookes proposed in 1879, that the cathode rays were radiant matter or negatively charged particles that were attracted to the anode and repelled from the cathode (Cambridge Physics, 2015).
In Germany, Hertz conducted an experiment where he observed that the rays discharged could pass through very thin gold sheets. He also conducted another experiment to find out the impact of electric fields on the rays and wrongly concluded that the rays were not deflected by the electric fields. In 1897, J.J Thomson repeated Hertz’s experiment (Cambridge Physics, 2015).
The difference between J.J Thomson’s experiment and Hertz’s experiment was that J.J Thomson conducted his experiment in a vacuum tube. Hertz had too much gas in his discharge tube and the gas had become ionized by the electric field. The positive ions were attracted to the negative plate and the negative ions were attracted to the positive plate. This reduced the net charge on the plates and the strength of the field was not enough to deflect the cathode rays.
J.J Thomson repeated the experiment and when he passed the cathode rays through the electric field in a vacuum, deflection occurred. The fact that the cathode rays moved towards the positively charged plate allowed him to conclude that the rays must be negatively charged.
After this, J.J Thomson used two coils of wire known as the Helmholtz pair to produce a uniform magnetic field. Any beam of charged particles when passed through the magnetic field produced by the Helmholtz pair will be bent at 90 degree angle to the field into a complete circle
Using this concept, J.J Thomson positioned the coils to cause a deflection in the opposite direction to that produced by the electric field. To balance the forces ...Download file to see next pagesRead More
Cite this document
  • APA
  • MLA
(“Discovery of electrons(J,J Thomson) Essay Example | Topics and Well Written Essays - 750 words”, n.d.)
Discovery of electrons(J,J Thomson) Essay Example | Topics and Well Written Essays - 750 words. Retrieved from
(Discovery of electrons(J,J Thomson) Essay Example | Topics and Well Written Essays - 750 Words)
Discovery of electrons(J,J Thomson) Essay Example | Topics and Well Written Essays - 750 Words.
“Discovery of electrons(J,J Thomson) Essay Example | Topics and Well Written Essays - 750 Words”, n.d.
  • Cited: 0 times
Comments (0)
Click to create a comment or rate a document
Dior J`adore Perfume
...? DIOR J`ADORE PERFUME Inserts His/Her Inserts Grade Inserts 19 March Dior J`adore Perfume 0 Situation Analysis/Current Marketing of Dior J’adore Perfume 1.1 Current Product: J’adore is the name of a perfume, introduced by Christian Dior. It was founded in the year 1999. Till now it remains one of the most renowned brands in the world. J’adore is the most popular brand of perfumes for women. J’adore, Perfume is a combination of blackberry, rose, violet, mandarin and orchid. “Absolute feminity” is one of the slogans for J’adore” (Dior 2012, para. 1). J’adore has the market share of 30% in the world market, and thus France became the No.1 in perfume exporting country in the world. The customers get long...
8 Pages(2000 words)Essay
...? of the of the J&J Company The J&J Company manufactures the drug Tylenol which is used to cure flue and fever. However since it was first commercially released in the market, it has been in the limelight for various controversies. The reputation of the Company has greatly been tarnished by the stories of deaths which the drug had caused The J&J Company is faced with a dilemma because it cannot give direct warnings regarding specific organs as this would only cause confusion about the use of drug. Also they cannot mention about the risk of death on the warning label because people with suicidal tendencies may start using it. The drug...
1 Pages(250 words)Assignment
J-trading:full circle outsourcing
...? J-TRADING: FULL CIRCLE OUTSOURCING Contents Contents 2 J-TRADING: FULL CIRCLE OUTSOURCING 3 Sourcing strategy 3 Motives for each type of service: help desk and data centre 4 Vendor strategy and contracting 5 Cost-Benefit analysis 5 Transition management and ongoing management governance practices 6 Key problems with J Trading’s sourcing strategy and rationality of decisions taken 7 Helpdesk problem in 2002: Recommendations to John Smith 8 Incorporation of off-shoring strategy 9 Recommendation 11 References 13 J-TRADING: FULL CIRCLE OUTSOURCING Sourcing strategy The application management division has been performing well with the employees of the division being...
12 Pages(3000 words)Essay
J. Alfred Prufrock
...The Use of Images in T. S Eliot’s ‘The Love Song of J. Alfred Prufrock’ ‘The Love Song of J. Alfred Prufrock’ starts with the image of time, much in comparison and contrast with the carpe diem theme of Andrew Marvell that T.S Eliot draws upon consistently in the latter parts of the poem as well. There exist a number of auditory, visual and tactile images in the poem, ranging from colors, animate and inanimate objects and sensory experiences of human togetherness. It can be observed that the images that recur in the poem, even as they refer to the objects related to real-life existence, are rather abstract. And the images are more akin to the metaphysical aspects of life than merely metaphorical ones. It...
4 Pages(1000 words)Essay
Alberto J. Moras Memorandum
...Alberto J. Mora’s Memorandum Alberto J. Mora wrote this memorandum (NAVIG Memo 5021 Ser 00/017 of 18 Jun 04) in answer to the request of the Inspector General of the Department of the Navy to write in detail his and the Department of the Navy Office of the General Counsels’ (OGC) involvement in the development of the interrogation rules of engagement”(IROE) for Operation Enduring Freedom and Operation Iraqi Freedom. Mora emphasized that the OGC had no official responsibility to be involved in detainee interrogation, practices, procedures or doctrines including IROE except when it was requested to participate. As for himself, he obtained a measure of insight into detainee treatment and interrogation...
3 Pages(750 words)Term Paper
T. J. Maxx breach
...T. J. Maxx breach, Computer sciences and Information technology enter the Number or College 7th December, 2011. • Major characteristics of incident and losses of confidentiality, integrity, and availability  The most infuriating and annoying part of the TJX cyber security issues is that it could have been avoided because the way of encryption used for the wireless internet used by the company was an obsolete one (Stevens, 2010, p. 2).The cyber security incident of the TJX was the worst one for the customers, the banks and TJX itself. According to Matwyshyn (2009, p.9), losses of confidentiality, integrity, and availability are important because they are private and confidential data of the customers. Customers lose their...
2 Pages(500 words)Research Paper
J Two
... this figure is compared to the financial year 2009 which is 1,969.9, it shows a 25% increase in sales to forecast and yet we had a 5% restructuring cost on the new sales. Assumptions made here include all costs remained as a fixed percentage of sales. This assumption is unreasonable since in the normal running of a business, the organization can incur more or less cost than stipulated cost as a fixed percentage of sales (Duchac et al, 2007). Reference Duchac, J. E., Reeve, J. M., & Warren, C. S. (2007). Financial accounting: An integrated statements approach. Mason, OH: Thomson/South-Western... and Accounting Question one Determining year-to-year percentage annual growth in total net sales Percentage annual growth in total net sales = curren...
2 Pages(500 words)Essay
Madam C. J. Walker
...Madam C. J. Walker Most cosmetologists are aware that the foundation of cosmetology in America had been in the hands of a black woman. She was called Sarah Breedlove in her childhood, but the world knows her as Madam C. J. Walker. Not many are aware that important chronicles from the life of this leading Afro-American entrepreneur of the early nineteenth century would have been lost to time, had not the good will of her great-great-granddaughter prevailed. Yes, whatever we know of Madam Walker, we owe it to A’Lelia Bundles, whose obsession with writing translated itself into revealing to the world, the unknown private world of women in the Walker family, led by the inevitable Madam C.J. Walker. To the...
7 Pages(1750 words)Essay
J curve
...International Finance Test 4 (10% WEIGHTING) Thursday 20th November Support your answers with examples and graphs where relevant. Question Explain the so-called “J-curve” theory. The J-curve theory is the description for the temporary design in the variation of the trade balance of the country in reaction to a significant or abrupt weakening or depreciation of the country’s currency. The temporary design usually resembles a J. Temporary variation of the trade balance of the country can be similar to the volatility experienced in the rates of exchange. If the volatility in the exchange rates and the variation in the trade balance of the country occur for a long time, then, serious implications do arise. However, the question... is, what...
3 Pages(750 words)Essay
Research J 5.3
... and assessment of data. References Adler, E., & Clark, R. (2014). An invitation to social research: How its done. Cengage Learning. Top of Form Bayens, G. J., & Roberson, C. (2010). Criminal justice research methods: Theory and practice. CRC Press. Dantzker, M. L., & Hunter, R. D. (2012). Research methods for criminology and criminal justice. Sudbury, Mass: Jones & Bartlett Learning Top of Form Maxfield, M. G., & Babbie, E. R. (2012). Basics of research methods for criminal justice and criminology. Belmont, CA: Wadsworth/Cengage Learning Wainer, H., & Braun, H. I. (Eds.). (2013). Test validity. Routledge Bottom of Form Bottom of Form... methods in criminal justice due: Introduction The term validity refers to whethera test, in fact, measures ...
2 Pages(500 words)Essay
sponsored ads
We use cookies to create the best experience for you. Keep on browsing if you are OK with that, or find out how to manage cookies.
Let us find you another Essay on topic Discovery of electrons(J,J Thomson) for FREE!
logo footer
Contact us:
Contact Us Now
FREE Mobile Apps:
  • StudentShare App Store
  • StudentShare Google play
  • About StudentShare
  • Testimonials
  • FAQ
  • Blog
  • Free Essays
  • New Essays
  • Essays
  • Miscellaneous
  • The Newest Essay Topics
  • Index samples by all dates
Join us:
Contact Us