around 1869-1875
The Crookes' Tube
Sir William Crookes was a British chemist who contributed to the knowledge of chemistry. One thing he did was discover an element that had a bright green emission line in its spectrum. He named the previously unknown element thallium.
The Crookes tube was invented in 1875 by British chemist and physicist Sir William Crookes. It was one of the early experimental vacuum tubes used for scientific research in the field of cathode ray experiments.
He is a scientist who modified and experimented with discharge tube
William Crookes used a device called a Crookes tube in his experiments. This was a sealed glass tube that contained rarefied gas and electrodes for producing cathode rays. The Crookes tube was instrumental in the discovery of cathode rays and contributed to the development of early atomic theory.
William Crookes used a cathode ray tube to test John Dalton's theory of the existence of atoms. By observing the behavior of cathode rays in the tube, Crookes provided evidence supporting the idea of discrete, indivisible particles.
Cathodes(electrons) (-)
1870
Will EVER body says that Sir William Crookes HELP INVENT THE FOURTH STAE OF MATTER......................PLASMA
Sir William Crookes was born on June 17, 1832.
William Crookes was a prominent British chemist and physicist known for his pioneering work in vacuum technology and the investigation of cathode rays, which contributed to the development of atomic theory. He invented the Crookes tube, an early type of vacuum tube that led to the discovery of electrons. Crookes also conducted research on radioactivity and is credited with discovering several chemical elements, including thallium. Additionally, he was a founding member of the Royal Society and received numerous accolades for his contributions to science.
Plasma was discovered by using a Crookes tube, wherein air is ionized in an electrical discharge tube, through the application of a high voltage. It was discovered by Sir William Crookes in 1879.