Which one of the following results in the discovery of proton.
Correct answer: B. Canal rays
- A. Cathode rays
- B. Canal rays
- C. X-rays
- D. Alpha rays
Explanation
Canal rays, also called positive rays, consist of positively charged ions and were observed by Eugen Goldstein. Their study helped lead to the discovery of the proton. Cathode rays are electrons, so students who confuse positive and negative beams may choose cathode rays.
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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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