A-LevelPhysicsSuperposition9702/12 · Oct/Nov 2023 · Q291 Mark
Light of wavelength 690 nm passes through a diffraction grating with 300 lines per mm, producing a series of bright spots (maxima) on a screen. [Figure 29.1] What is the total number of bright spots that are produced?
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A4
B5
C8
D9
✓ Correct answer
D: 9
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