Why did JJ Thomson do his experiment?

Why did JJ Thomson do his experiment?

He decided to try to work out the nature of the particles. They were too small to have their mass or charge calculated directly, but he attempted to deduce this from how much the particles were bent by electrical currents, of varying strengths.

What was JJ Thomson’s theory?

In 1897, J. J. Thomson discovered the first subatomic particle, the electron, while researching cathode rays. To explain the neutrality of atoms, Thomson proposed a model of the atom in which negative electrons are scattered throughout a sphere of positive charge. He called his atom the plum pudding model.

What was the conclusion of JJ Thomson experiment?

After completing the experiment J.J. Thomson concluded that rays were and are basically negatively charged particles present or moving around in a set of a positive charge. This theory further helped physicists in understanding the structure of an atom.

How did JJ Thomson discover the electron?

Thomson discovered the electron by experimenting with a Crookes, or cathode ray, tube. He demonstrated that cathode rays were negatively charged. In addition, he also studied positively charged particles in neon gas.

What did JJ Thomson discover simple?

In 1897 Thomson discovered the electron and then went on to propose a model for the structure of the atom. His work also led to the invention of the mass spectrograph.

What did JJ Thomson discover?

On his return from America, he achieved the most brilliant work of his life – an original study of cathode rays culminating in the discovery of the electron, which was announced during the course of his evening lecture to the Royal Institution on Friday, April 30, 1897.

Why did JJ Thomson experiment with cathode ray tubes?

Perrin had found that cathode rays deposited an electric charge. Thomson wanted to see if, by bending the rays with a magnet, he could separate the charge from the rays. He found that when the rays entered the slit in the cylinders, the electrometer measured a large amount of negative charge.

What was the conclusion of the experiment?

A conclusion is a statement based on experimental measurements and observations. It includes a summary of the results, whether or not the hypothesis was supported, the significance of the study, and future research. What is an Experiment? It is a detailed procedure designed to test a hypothesis.

What was JJ Thomson’s cathode ray experiment?

Thomson used an electric field and placed two charged metal plates on either side of the cathode ray tube. One metal plate was positively charged, and the opposite plate was negatively charged. Additionally, Thomson added a fluorescent coating on the end of the cathode ray tube where the cathodes would impact.

Where did JJ Thomson discover the electron?

Joseph John Thomson (J. J. Thomson, 1856-1940; see photo at American Institute of Physics) is widely recognized as the discoverer of the electron. Thomson was the Cavendish professor of Experimental Physics at Cambridge University and director of its Cavendish Laboratory from 1884 until 1919.

Why did J.J. Thomson experiment with cathode ray tubes?

Perrin had found that cathode rays deposited an electric charge. Thomson wanted to see if, by bending the rays with a magnet, he could separate the charge from the rays. He found that when the rays entered the slit in the cylinders, the electrometer measured a large amount of negative charge.

Who inspired J.J. Thomson?

Influenced by the work of James Clerk Maxwell land the discovery of the X-ray, Thomson deduced that cathode rays (produced by Crookes tube) exhibited a single charge-to-mass ratio e m and must be composed of a single type of negatively charged particle, which he called “corpuscles.” G.

What experiments led to J.J. Thomson’s discovery?

It was cathode ray tubes that allowed the English physicist J.J. Thomson to discover the existence of electrons in 1897.

What did J.J. Thomson discover and when?

On his return from America, he achieved the most brilliant work of his life – an original study of cathode rays culminating in the discovery of the electron, which was announced during the course of his evening lecture to the Royal Institution on Friday, April 30, 1897.