Exam-style question
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Explain Describe The Conditions Needed For Sustained Interference in a way that directly answers the AQA A-Level Physics objective.
Model answer
What a good answer should say
- Error Check response 9e04be: state Describe the conditions needed for sustained interference., apply phase difference, path difference, stationary wave, progressive wave, diffraction, and finish with the physical consequence for Refraction, diffraction and interference.
Explanation
Why this works
Stem being answered: Explain Describe The Conditions Needed For Sustained Interference in a way that directly answers the AQA A-Level Physics objective. Route focus: waves / Refraction Diffraction And Interference.
Key vocabulary for this item: conditions, needed, sustained, interference. 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.
Common mistake
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