discovery of electrons

Dear Student,

The brief explanation for the discovery of electron is describes as:

Discovery of Electron (Michael Faraday’s Cathode Ray Discharge Tube Experiment)

  • Experimental Setup:

    • Glass tube is partially evacuated (Low pressure inside the tube)

    • Very high voltage is applied across the electrodes

  • Observation:
    Stream of particles move from the cathode (− ve) to the anode (+ ve) −−− known as cathode rays or cathode ray particles

  • Results:

    • Cathode rays move from the cathode to the anode.

    • Cathode rays are not visible. They can be observed with the help of phosphorescent or fluorescent materials (such as zinc sulphide).

    • These rays travel in a straight line in the absence of electric and magnetic fields.

    • The behaviour of cathode rays is similar to negatively charged particles (electrons) in the presence of an electrical or a magnetic field.

    • Characteristics of cathode rays do not depend upon: the material of the electrodes and the nature of the gas present in the tube

  • Conclusions:

    • Cathode rays consist of electrons.

    • Electrons are the basic units of all atoms.

Hope it is clear to you.


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