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The photoelectric effect represent that

1. Light has a particle nature
2. Electron has a wave nature
3. Proton has a wave nature
4. None of the above

Correct answer: Light has a particle nature

Solution

The photoelectric effect shows that light delivers energy in quantized packets called photons, not as a purely continuous wave. This is why electrons are emitted only when the light frequency is high enough, supporting the particle nature of light.

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