Exam-style question
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Define a photon and a particle in the context of wave-particle duality. What is the key difference between them?.
Model answer
What a good answer should say
- A photon is a quantum of electromagnetic radiation that exhibits wave-like properties, while a particle is a discrete unit of matter that has mass and occupies space.
- The key difference is that photons are massless and can travel at the speed of light, whereas particles have mass and cannot reach this speed.
- Photons apply in contexts involving light and electromagnetic radiation, while particles are relevant in discussions of matter and its interactions.
Explanation
Why this works
This question tests the understanding of wave-particle duality by requiring definitions and a comparison of photons and particles. It assesses the ability to distinguish between two fundamental concepts in physics, which is crucial for understanding quantum mechanics.
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