Exam-style question
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Describe the observations made in the photoelectric effect that support photon theory.
Model answer
What a good answer should say
- Key observations include that electrons are emitted only when light exceeds a certain frequency, regardless of intensity, and that the number of emitted electrons increases with light intensity above this threshold.
- Additionally, the emission of electrons occurs instantaneously upon exposure to light.
Explanation
Why this works
This answer is strong as it summarizes critical experimental results that validate photon theory, showing the student's grasp of the evidence supporting the theory. It tests the ability to recall and articulate specific observations related to the photoelectric effect.
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