Exam-style question
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What conclusion can be drawn from the deflection of cathode rays in both electric and magnetic fields?.
- A.Cathode rays are neutral particles.
- B.Cathode rays are composed of charged particles.
- C.Cathode rays have no mass.
- D.Cathode rays are only affected by electric fields.
Model answer
What a good answer should say
- Cathode rays are composed of charged particles.
Explanation
Why this works
The evidence from the deflection of cathode rays in electric and magnetic fields shows that they respond to these fields, indicating they are charged. This implies that the behavior of the rays is consistent with the presence of charged particles.
Therefore, the conclusion is that cathode rays consist of charged particles, which is fundamental to the discovery of the electron.
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