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A-LevelPhysicsWaves9702/12 · Oct/Nov 2012 · Q301 Mark

Monochromatic light of wavelength 690 nm passes through a diffraction grating with 300 lines per mm, producing a series of maxima on a screen. [Figure showing diffraction grating and screen] What is the greatest number of maxima that can be observed?

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A4

B5

C8

D9

✓ Correct answer

D: 9

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About this question

Topic: Waves, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, Oct/Nov 2012 Paper 1 Variant 2, question 30.

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