Discovery Of Electrons.

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   Around 1879, William Crookes observed that when an electric discharge from high potential source is passed through a gas at 0.001 mm pressure of Hg in a discharge tube. the glass wall opposite to the cathode began to glow witha very faint greenish light.

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this glow ir fluorescence  is formed due to the bombardment on the glass by certain rays which are emitted from the cathode surface and move towards the anode with tremendous velocity.    this rays is called Cathode  rays.


properties of cathode rays :

  1. they are deflected from their original straight line path by the application of both electric and magnetic fields and the direction of deflection  indicates that they consist of negatively charged particles. 
  2. they  produce a mechanical motion on small and very light paddle wheel when it is placed in the path of cathode rays.this confirms the presence of material particles in cathode rays.
  3. Cathode rays produce X-rays when they strike the surface of  heavy metal like tungsten. 

The properties of cathode rays and their behavior in electric and magnetic fields, prove that the cathode rays are made up of fast moving tiny material particles chaŕged with negative electricity.  these particles are called Electrons. 

Location: India Kolkata, West Bengal, India
This is Shoaib Alam, Man behind your ElectronGate

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