When diffraction grating physics questions have a trick
OCR Modelling Physics 2020 Multiple Choice Question on diffraction gratings. Most people did not get this question, right. Let's have a look! : )
You can find the question paper on the OCR website:
https://www.ocr.org.uk/Images/643598-...
Official Mark Scheme:
https://www.ocr.org.uk/Images/643603-...
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