Alpha particles can be detected by using___________?
Correct answer: C. Zinc sulphide screen
- A. Gold foils
- B. Barium sulphate
- C. Zinc sulphide screen
- D. Thin Aluminium sheet
Explanation
Alpha particles produce flashes of light when they strike a zinc sulphide screen, allowing their paths or impacts to be detected. Gold foil was used in Rutherford's scattering experiment, not as the detector itself. Students may choose a because gold foil is strongly associated with alpha particles, but it served as the scattering target.
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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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