Exam-style question
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Evaluate why wave theory alone was insufficient to explain the photoelectric effect.
Model answer
What a good answer should say
- Wave theory alone was insufficient because it could not account for the threshold frequency required for electron emission.
- However, it successfully explained the wave nature of light, such as interference patterns.
- The photoelectric effect demonstrated that light behaves as particles (photons), which provided evidence that wave theory could not explain.
- Therefore, while wave theory contributed to understanding light, it was the particle model that ultimately clarified the photoelectric effect.
Explanation
Why this works
This question tests the student's ability to critically assess the limitations of wave theory in the context of the photoelectric effect. The answer demonstrates understanding of both wave and particle theories, providing a balanced evaluation.
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