3/26/2023 0 Comments Cathode ray experiment jj thomson![]() ![]() These subatomic particles can be found within atoms of all elements.Ĭonclusion - The cathode rays are made up of negatively charged particles known as electrons. Thomson also placed two magnets on either side of the tube, and observed that this magnetic field also deflected the cathode ray. This indicated that the cathode ray was composed of negatively-charged particles. The cathode ray was deflected away from the negatively-charged electric plate and towards the positively-charged plate. Thomson's experiment on constituents of cathode rays:Įxperiment - To test the properties of the particles, Thomson placed two oppositely-charged electric plates around the cathode ray. An electric discharge is passed through the tube.Įmission of blue rays can be seen from the cathode.Ĭonclusion - The blue rays emitted from cathode are cathode rays. William Crookes experiment for the discovery of cathode rays:Įxperiment - The figure shows a vacuum tube which has a gas at a very low pressure. ![]() The discovery of cathode rays lead to the discovery of electrons : ![]() Thomson found that this value comes to \( 1.76 \times 10^8 C/g \).The three subatomic particles that constitute an atom are:
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