Exam-style question
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How does the photoelectric effect provide evidence for the particle nature of light?.
- A.Light can be diffracted
- B.Light can be polarized
- C.Light causes electrons to be emitted from a metal surface
- D.Light travels at a constant speed
Model answer
What a good answer should say
- Light causes electrons to be emitted from a metal surface
Explanation
Why this works
The photoelectric effect shows that light can eject electrons from a material, which supports the idea of light behaving as particles (photons) that transfer energy to electrons. This is distinct from wave behavior, which cannot explain the immediate emission of electrons.
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