<ul><li>Joseph John Thomson </li></ul><ul><li>18 December 1856 - 30 August 1940 </li></ul><ul><li>an English physicist, th...
<ul><li>Influenced by the work of James Clerk Maxwell, and the discovery of the X-ray, he deduced that cathode rays existe...
Created by Jarad
<ul><li>Investigate if the negative charge could be separated from the cathode rays by means of magnetism </li></ul><ul><l...
<ul><li>Investigated if the rays could be deflected by an electric field </li></ul><ul><li>A cathode ray tube with a pract...
 
<ul><li>Wanted to see if the mass could be measured to charge ratio (mass divided by amount of charge). </li></ul><ul><li>...
<ul><li>In the year 1896 he defined the connection of particles charge and its mass (q/m).  </li></ul><ul><li>Based on col...
<ul><li>http://nobelprize.org/nobel_prizes/physics/laureates/1906/thomson-bio.html </li></ul><ul><li>http://www.websters-o...
<ul><li>Chitlada </li></ul><ul><li>Jarad </li></ul><ul><li>Nopparat </li></ul><ul><li>Suleeporn </li></ul>
Upcoming SlideShare
Loading in …5
×

JJ Thomson (student preso)

2,257 views

Published on

student presentation
general physics 1
presentation 2 group 3
Physics Nobel Prize Winner
21 Feb 2009

Published in: Education
0 Comments
1 Like
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total views
2,257
On SlideShare
0
From Embeds
0
Number of Embeds
37
Actions
Shares
0
Downloads
0
Comments
0
Likes
1
Embeds 0
No embeds

No notes for slide

JJ Thomson (student preso)

  1. 2. <ul><li>Joseph John Thomson </li></ul><ul><li>18 December 1856 - 30 August 1940 </li></ul><ul><li>an English physicist, the discoverer of the electron </li></ul><ul><li>Born in Manchester, England </li></ul><ul><li>One of his students was Ernest Rutherford, who would later succeed him in the post. </li></ul>
  2. 3. <ul><li>Influenced by the work of James Clerk Maxwell, and the discovery of the X-ray, he deduced that cathode rays existed of negatively charged particles, which he called &quot;corpuscles&quot;, and which are now known as electrons. </li></ul><ul><li>His discovery was made known in 1897, and caused a sensation in scientific circles, eventually resulting in his being awarded a Nobel prize (1906). </li></ul><ul><li>Prior to the outbreak of World War I in 1918, he made another ground-breaking discovery: the isotope. </li></ul>
  3. 4. Created by Jarad
  4. 5. <ul><li>Investigate if the negative charge could be separated from the cathode rays by means of magnetism </li></ul><ul><li>A cathode ray tube ending in a pair of cylinders with slits which are connected to an electrometer </li></ul><ul><li>If the rays were magnetically bent such that they could not enter the slit, the electrometer registered little charge. As a result, the negative charge was inseparable from the rays. </li></ul><ul><li>Failed because of trace amount of gases </li></ul>
  5. 6. <ul><li>Investigated if the rays could be deflected by an electric field </li></ul><ul><li>A cathode ray tube with a practically perfect vacuum, and coated one end with phosphorescent paint </li></ul><ul><li>Thomson found that the rays bend under the influence of an electric field, in a direction indicating a negative charge. </li></ul>
  6. 8. <ul><li>Wanted to see if the mass could be measured to charge ratio (mass divided by amount of charge). </li></ul><ul><li>Measured how far the ray was deflected by a magnetic field </li></ul><ul><li>He found that mass to charge ratio was over a thousand times lower than that of a hydrogen ion (H+), suggesting either that the particles were very light or very highly charged. </li></ul>
  7. 9. <ul><li>In the year 1896 he defined the connection of particles charge and its mass (q/m). </li></ul><ul><li>Based on collector's mass, its specific heat and the heat gain, he could evaluated thermal energy. </li></ul><ul><li>The total charge Q assembled on the collector one can evaluate knowing the charge of one particle q and a number of particles falling on the instrument n </li></ul>
  8. 10. <ul><li>http://nobelprize.org/nobel_prizes/physics/laureates/1906/thomson-bio.html </li></ul><ul><li>http://www.websters-online-dictionary.org/Th/Thomson.html </li></ul>
  9. 11. <ul><li>Chitlada </li></ul><ul><li>Jarad </li></ul><ul><li>Nopparat </li></ul><ul><li>Suleeporn </li></ul>

×