Positive rays are produced__________________?
Correct answer: C. By the bombardment of cathode rays on gas molecules
- A. By burning of gas
- B. By cooling of the gas
- C. By the bombardment of cathode rays on gas molecules
- D. From anode like cathode rays produced from cathode
Explanation
Cathode rays collide with gas molecules and remove electrons from them, producing positively charged ions. These positive ions form canal rays or positive rays and move toward the cathode. Students may choose d because the rays pass through holes in the cathode and appear to come from the anode, but they are produced from ionized gas molecules.
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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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