Angle of deflection was studied by________________?
Correct answer: D. J.Perrin
- A. Hitorff
- B. Stoney
- C. William Crookes
- D. J.Perrin
Explanation
J. J. Thomson studied positive rays, while J. Perrin investigated their deflection and showed that they carried positive charge. Therefore, the angle of deflection in this context is associated with J. Perrin. Students may choose William Crookes because he is strongly associated with cathode-ray studies and discharge tubes.
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About Discovery of the Proton
The discovery of the proton follows the study of positive rays, also called canal rays, observed in discharge tubes and later identified as positively charged particles. The work of Goldstein and Rutherford is linked to the proton's charge, relative mass and role in the nuclear model, distinct from the discovery of the electron.
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