A-LevelPhysicsSuperposition9702/12 · May/June 2022 · Q301 Mark

The equation λ = d sin θ / n is used to calculate the wavelength λ of light in an experiment that uses a diffraction grating. The light from the diffraction grating is displayed on a screen. What do the symbols n and d represent?

An: number of slits in the grating, d: distance between adjacent slits in the grating

Bn: number of slits in the grating, d: distance from grating to screen

Cn: order of intensity maximum, d: distance between adjacent slits in the grating

Dn: order of intensity maximum, d: distance from grating to screen

✓ Correct answer

C: n: order of intensity maximum, d: distance between adjacent slits in the grating

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Topic: Superposition, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, May/June 2022 Paper 1 Variant 2, question 30.

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