Thomson's Plum Pudding Model and Radioactivity Discovery
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Ba
ckground:
• Atoms were previously thought to be indivisible particles, as proposed b
y John Dalton.
• The discovery of the electron,...

In 1897, J.J. Thomson conducted an experiment that led to the discovery of the electron and revolutionized atomic theory by demonstrating that atoms are composed of smaller subatomic particles. Before this, atoms were considered...

Cathode Rays: Key Properties

• Straight-Line Travel: Cathode rays travel in straight lines, casting sharp sha
dows.
• Negatively Charged: Composed of negatively charged particles, specifically electrons, deflected by...

Discharge tube experiments are crucial in understanding atomic structure and the discovery of subatomic particles. These experiments involve the interaction of electricity with gases at low pressures, observing cathode rays and their...

The History of Physics (Part 2)

It explains the discovery of protons and neutrons and their characteristics.

It explains the discovery of electrons by using the cathode ray discharge tube and the e/m ratio. It also shows how to find the charge of electrons.