Question

explain the discovery of electron?

Answer 1

hi there!!
DISCOVERY OF ELECRON .
The elecron was the first fundamental particle.
it was discovered by J.J Thomson by utilizing Faraday's study of electrical discharge in partially evacuated tubes, know as cathode ray tube.

Cathode ray tube : it is cylindrical hard glass tube fitted with two metallic electrodes to the oppositely charged poles of a high voltage source (battery) .

observation : When the gas taken in the tube was subjected to very low pressure maintained by a vaccum pump and high voltage@ 10000-20000 volts then the current flown through the steam of particles moving in the tube from cathode(-ve) to anode(+ve) . therefore these steam of particles were known as cathode ray later on it was named Electron...!!

hope it helps you!!

Answer 2

One hundred years ago,amidst glowing glass tubes and the hum of electricity, the British physicist J.J. Thomson was venturing into the interior of the atom. At the Cavendish Laboratory at Cambridge University, Thomson was experimenting with currents of electricity inside empty glass tubes. He was investigating a long-standing puzzle known as "cathode rays." His experiments prompted him to make a bold proposal: these mysterious rays are streams of particles much smaller than atoms, they are in fact minuscule pieces of atoms. He called these particles "corpuscles," and suggested that they might make up all of the matter in atoms. It was startling to imagine a particle residing inside the atom--most people thought that the atom was indivisible, the most fundamental unit of matter.

Thomson's speculation was not unambiguously supported by his experiments. It took more experimental work by Thomson and others to sort out the confusion. The atom is now known to contain other particles as well. Yet Thomson's bold suggestion that cathode rays were material constituents of atoms turned out to be correct. The rays are made up of electrons: very small, negatively charged particles that are indeed fundamental parts of every atom.

Modern ideas and technologies based on the electron, leading to television and the computer and much else, evolved through many difficult steps. Thomson's careful experiments and adventurous hypotheses were followed by crucial experimental and theoretical work by many others in the United Kingdom, Germany, France and elsewhere. These physicists opened for us a new perspective--a view from inside the atom.

Hope it helped.