The two ways were,
A cathode-ray tube, often known as a CRT, is a vacuum tube that houses one or more electron cannons that produce electron beams that are then bent to produce pictures on a phosphorescent screen. The visuals might be pictures (from a television or computer display), electrical waveforms (from an oscilloscope), radar targets, or other occurrences.
Tomson came to the conclusion that atoms can be divided into their constituent corpuscles (atoms are made up of smaller particles).
The electron was discovered in 1897 by J. J. Thomson.
His "plum pudding" concept from 1904 postulated that the positive charge contains embedded electrons.
With this model, he disproved his first theory (the atom was composed of immaterial vortices).
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