Question : Which Nobel Laureate experimented in the late 19th century and observed that a glass tube filled with a low-pressure gas emitted radiation when a voltage was applied between two metal plates?
Option 1: Victor Francis Hess
Option 2: Philipp Lenard
Option 3: Paul Dirac
Option 4: Hideki Yukawa
Correct Answer: Philipp Lenard
Solution : The correct answer is Philipp Lenard .
In the late 19th century, experiments with cathode rays, emitted when a voltage passes through low-pressure gas in a glass tube, unveiled electrons and X-rays. Philipp Lenard's pivotal 1893 experiments, involving a glass tube with a thin aluminium window, conclusively demonstrated the non-electromagnetic nature of the radiation.
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