![]() His cathode ray particles were eventually given a more common name: electrons. ![]() Thomson’s discoveries were initially contentious, but they were progressively accepted by scientists. Within the atoms of all elements, these subatomic particles may be found.Because the mass of each particle is ∼ 1/2000 that of a hydrogen atom, they must be part of the atom.Negatively charged particles make up the cathode ray.Thomson made the following findings based on the evidence: Thomson continued his tests with several metals as electrode materials and discovered that the characteristics of the cathode ray were consistent regardless of the cathode material. ![]() Thomson used the findings of these tests to calculate the mass-to-charge ratio of cathode ray particles, which led to a surprising discovery: each particle’s mass was much, much lower than any known atom. Thomson also installed two magnets on either side of the tube and noticed that the cathode ray was diverted by the magnetic field. The cathode ray was made up of negatively charged particles, according to this. The cathode ray was redirected from the negatively charged electric plate to the positively charged plate. Thomson surrounded the cathode ray with two oppositely charged electric plates to investigate the particles’ characteristics. When the cathode ray strikes the phosphors, they spark or emit light. The beam may be detected by painting phosphors on the tube’s far end, beyond the anode. At one end of the tube, a high voltage is placed between two electrodes, causing a stream of particles to flow from the cathode (the negatively charged electrode) to the anode (the positively charged electrode) (the positively charged electrode).īecause the particle beam, or cathode ray, starts at the cathode, the tubes are termed cathode ray tubes. Cathode ray tubes are vacuum-sealed glass tubes that have had most of the air removed. Thomson, a scientist, began working with cathode ray tubes in the early 1900s.
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