Physics (AS & A Level) · Feb / March 2023 · Paper 12 · Question 29

The diagram shows a screen that is a distance L from a diffraction grating. The grating has a total number of N lines. Any two adjacent lines are a distance d apart. A beam of parallel light of wavelength λ is incident normally on the grating. Which quantities affect the distance between the first-order diffraction maxima on the screen?

1. Ad ✓, λ ✓, L ✓, N ✗
2. Bd ✓, λ ✓, L ✗, N ✗
3. Cd ✓, λ ✗, L ✓, N ✓
4. Dd ✗, λ ✓, L ✗, N ✓

As printed in the paper