Practicing Success

Target Exam

CUET

Subject

Physics

Chapter

Dual Nature of Radiation and Matter

Question:
Discovery of Cathode Rays is attributed to ____?
Options:
R.A. Millikan
Roentgen
J.J. Thompson
William Crookes
Correct Answer:
William Crookes
Explanation:
In 1878, Sir William Crookes, a British scientist, displayed the first cathode rays using a modification of the Geissler apparatus. His major contribution to construction of the tube was to develop ways to evacuate almost all the air from the tube.