![]() words we can say that it is a zero velocity motion. (c) In the cathode ray, the beam (shown in yellow) comes from the cathode and is accelerated past the anode toward a fluorescent scale at the end of the tube. Thomson's cathode ray tube experiment led to the discovery of electrons. (b) This is an early cathode ray tube, invented in 1897 by Ferdinand Braun. (c) In the cathode ray, the beam (shown in yellow) comes from the cathode and. Thomson produced a visible beam in a cathode ray tube. ![]() Lenard19 followed up these experiments, and rays which had passed. Thomson produced a visible beam in a cathode ray tube. The results of these measurements indicated that these particles were much lighter than atoms (Figure 3.3. Scientists had now established that the atom was not indivisible as Dalton had believed, and due to the work of Thomson, Millikan, and others, the charge and mass of the negative, subatomic particles-the electrons-were known. Not even the particle theorists could believe that particles passed through solid matter.
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