Particle nature of cathode rays is proved due to the fact that they ________________?
Correct answer: B. Get deflected by magnetic electric field
- A. Travel in a straight line
- B. Get deflected by magnetic electric field
- C. Produce fluorescence
- D. Heat the exposed material
Explanation
Deflection by electric or magnetic fields shows that cathode rays carry charged particles, proving their particle nature. Straight-line travel, fluorescence and heating are effects that do not by themselves establish charge or particulate character.
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