Were these rays composed of particles, or were they some form of electromagnetic wave? The prevailing wisdom leaned towards the wave theory, but a series of unexplained observations hinted at a more complex reality. This exploration delves into the experiments, the context, and the profound implications of Thomson’s groundbreaking work at the turn of the 20th century.
The Cathode Ray Particle Wave Debate and Thomson's Key Experiments
The Crucial Experiment and the Birth of the Electron The definitive answer to "did JJ Thomson discover electrons" lies in the elegant experiments he conducted at the Cavendish Laboratory in Cambridge around 1897. In 1904, he proposed the "plum pudding" model, an imaginative analogy where the atom was a sphere of positive charge with the electrons embedded within it, like plums in a pudding.
The question of whether J. He didn't merely note the movement; he quantified it.
The Particle Wave Debate: Were Cathode Rays Made of Electrons?
He applied high voltage across the tube, observing the stream of rays traveling from the cathode to the anode. By balancing the magnetic and electric forces, he could neutralize the deflection of the corpuscles, allowing him to measure their velocity directly.
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