Exam-style question
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Explain how the size of the gap affects the diffraction of waves.
Model answer
What a good answer should say
- As the size of the gap decreases relative to the wavelength of the wave, the amount of diffraction increases.
- This is because smaller gaps cause the waves to spread out more as they pass through, leading to a more pronounced diffraction pattern.
Explanation
Why this works
This answer is strong because it clearly connects the relationship between gap size and diffraction, demonstrating an understanding of wave behavior. The question tests the student's ability to explain a fundamental concept in wave physics.
Common mistake
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