A-LevelPhysicsSuperposition9702/12 · Feb/Mar 2016 · Q261 Mark

Monochromatic light of wavelength 5.30 × 10⁻⁷ m is incident normally on a diffraction grating. The first order maximum is observed at an angle of 15.4° to the direction of the incident light. What is the angle between the first and second order diffraction maxima?

A7.7°

B15.4°

C16.7°

D32.1°

✓ Correct answer

C: 16.7°

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Topic: Superposition, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, Feb/Mar 2016 Paper 1 Variant 2, question 26.

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