J.J. Thomson was a British physicist born in 1856 who discovered the electron in 1897. As the director of the Cavendish Laboratory at Cambridge University, Thomson studied electrical currents inside cathode ray tubes and observed that the rays were streams of small, subatomic particles that he called "corpuscles," which we now know as electrons. Thomson's discovery of the electron established it as the first known subatomic particle and earned him the 1906 Nobel Prize in Physics.

2. Joseph John “J. J.”
Thomson
Born: December, 18 1856
Cheetham Hill, Manchester, UK
Died: 30 August 1940 (aged 83)
Cambridge, UK
Nationality: British
Fields: Physics
Institutions: Cambridge University
Alma mater: University of
Manchester, University of Cambridge.

3. Joseph John “J. J.”
Thomson

4.  SirJoseph John “J. J.”
Thomson, (18 December 1856 – 30
August 1940) was a British physicist
and Nobel laureate. He is credited
for the discovery of the electron
and of isotopes, and the invention
of the mass spectrometer.
Thomson was awarded the 1906
Nobel Prize in Physics for the
discovery of the electron and for
his work on the conduction of

5.  1897:
Physicist J.J. Thomson tells
a startled scientific audience
that he's discovered something
smaller than an atom, a particle
with a minuscule mass and a
negative charge. As director of
Cavendish Laboratory at
Cambridge University, Thomson
was researching electrical
currents inside cathode ray
tubes. He observed that the rays

6.  Researchershad been puzzled
by cathode rays until Thomson
theorized that the rays were in
fact streams of small
subatomic particles, the first
known. He called them
"corpuscles," the Latin for
"small bodies."

7.  Theelectron is discovered, J.J.
Thomson publishes his discovery
of a sub atomic particle common
to all matter. When investigating
cathode rays using a highly
evacuated discharge tube he was
able to use the calculated
velocity and deflection of the
beam to calculate the ratio of
electric charge to mass of the

8.  Thiswas found to be constant
regardless of the gas used in
the tube and the metal of the
cathode and was
approximately 1000 times less
than the value calculated for
hydrogen ions in the
electrolysis of liquids.

9. Cathode Ray
Tube

10. J.J. Thomson’s original Cathode Ray
Tube

11. Modernized Cathode Ray
Tube

12. Prepared By:
Baranggay 2- III Antimony