Question

Explain in brief – Goldstein’s experiment which led to the discovery of the proton.

Answer 1

Discovery of – Protons

• Discovery – Constituent of positive rays i.e. particles that contain – protons.

Experiment:

• Goldstein used a modified cathode ray tube with a perforated cathode.
• He observed a new type of rays produced from the anode passing through the holes of the perforated cathode. These rays were called anode rays.

Conclusion:

• Anode rays or positive rays consist of positively charged particles now called – protons.
• The positive rays were affected by electric & magnetic fields but – in a direction opposite to that of cathode rays.
• Thus with the discovery of the positive particles – proton was initiated.