Exam-style question
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Identify the key difference between diffraction and interference, and explain when each phenomenon occurs.
Model answer
What a good answer should say
- The key difference is that diffraction involves the bending and spreading of waves when they encounter obstacles, while interference is the result of the superposition of two or more waves leading to constructive or destructive patterns.
- Diffraction occurs when waves pass through narrow openings, while interference occurs when waves overlap, such as in a double-slit experiment.
Explanation
Why this works
This answer effectively distinguishes between the two phenomena, providing definitions and contexts for their occurrence. It tests the student's ability to compare and apply concepts in wave behavior.
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