A-LevelPhysicsSuperposition9702/12 · May/June 2023 · Q291 Mark
Green light of wavelength 550 nm is incident normally on a diffraction grating and produces a diffraction pattern on a screen placed 3.5 m from the diffraction grating. The third-order maximum on the screen is a distance of 0.75 m from the zeroth-order (central) maximum. [Figure 29.1] What is the distance between two adjacent slits in the diffraction grating?
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A2.6 × 10⁻⁶ m
B7.7 × 10⁻⁶ m
C7.9 × 10⁻⁶ m
D1.0 × 10⁻⁵ m
✓ Correct answer
C: 7.9 × 10⁻⁶ m
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