Jj thomson experiment

J.j. thomson discovery of electron
J.j. thomson discovery
J.j. thomson birth and death

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J. J. Thomson

English physicist (1856–1940)

This article is about the Nobel laureate and physicist. For the moral philosopher, see Judith Jarvis Thomson.

Sir Joseph John Thomson (18 December 1856 – 30 August 1940) was an English physicist who received the Nobel Prize in Physics in 1906 for his discovery of the electron, the first subatomic particle to be found.

In 1897, Thomson showed that cathode rays were composed of previously unknown negatively charged particles (now called electrons), which he calculated must have bodies much smaller than atoms and a very large charge-to-mass ratio.^[1] Thomson is also credited with finding the first evidence for isotopes of a stable (non-radioactive) element in 1913, as part of his exploration into the composition of canal rays (positive ions). His experiments to determine the nature of positively charged particles, with Francis William Aston, were the first use of mass spectrometry and led to the development of the mass spectrograph.^[1]^[2]

Thomson was awarded the 1906 Nobel Prize in Physics for his wor

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J. J. Thomson

Sir Joseph John "J.J." Thomson, OM, FRS (18 December 1856 – 30 August 1940) was a Britishphysicist and Nobel laureate. He discovered the electron and isotopes, and invented the mass spectrometer. He won the Nobel Prize in Physics in 1906 for his discovery of the electron and his work on how electricity works in gases. Joseph John Thomson in 1893 said: "There is no other branch of physics which affords us so promising an opportunity of penetrating the secret of electricity."

In 1897, Thomson showed that cathode rays were made of a previously unknown negatively charged particle of very small mass compared to its electric charge. It was later called the electron and was the first subatomic particle to be found. Thomson also found the first evidence for isotopes of a stable (non-radioactive) element in 1913, while studying anode rays (positive cations).

In atomic theory he suggested the idea that atoms were spheres of evenly spread positive charge, where an individual negatively charged electron resided. He later concluded there was more than one negatively char

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Joseph John Thomson

Joseph John Thomson, better known as J. J. Thomson, was a British physicist who first theorized and offered experimental evidence that the atom is a divisible entity rather than the basic unit of matter, as was widely believed at the time. A series of experiments with cathode rays he carried out near the end of the 19th century led to his discovery of the electron, a negatively charged atomic particle with very little mass. Thomson received the Nobel Prize in Physics in 1906 for his work exploring the electrical conductivity of various gases.

The son of a bookseller, Thomson was born on December 18, 1856, in Cheetham Hill, located just north of Manchester, England. He entered Owens College when he was 14 years old, where he became interested in experimental physics, though he had initially intended to pursue a career in engineering. Thomson’s father died only a few years into his college studies, making it financially difficult for Thomson to remain in school. However, through the efforts of his family and scholarships he continued at Owens College until 1