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Cathode rays are

  • A.Electromagnetic wave
  • B.Stream of alpha particle
  • C.Stream of electrons
  • D.Radiations

Answer: C

Cathode rays are a stream of electrons.

J.J. Thomson showed in 1897 that they are deflected by both electric and magnetic fields towards the positive plate, so they are negatively charged particles, and that their \(e/m\) ratio is the same whatever gas or electrode material is used - proving them a universal constituent of matter.

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