Exam-style question
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Explain Describe Doppler Shift For Waves From Moving Sources in a way that directly answers the AQA A-Level Physics objective.
Model answer
What a good answer should say
- Model Limit response dd49f5: state Describe Doppler shift for waves from moving sources., apply phase difference, path difference, stationary wave, progressive wave, diffraction, and finish with the physical consequence for Cosmology.
Explanation
Why this works
Stem being answered: Explain Describe Doppler Shift For Waves From Moving Sources in a way that directly answers the AQA A-Level Physics objective. Route focus: astrophysics / Cosmology.
Key vocabulary for this item: doppler, shift, waves, moving, sources. Written check: state the principle, apply it to the named context, and close with the requested conclusion.
The explanation should keep the answer tied to these exact words rather than a general physics summary, using units, graph evidence or equation reasoning only when they are relevant to the stem.
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