Physics (AS & A Level) · May / June 2025 · Paper 11 · Question 30
Light of wavelength 680 nm is incident normally on a diffraction grating with 450 lines mm⁻¹. What is the angle of diffraction of the second-order maximum in the diffraction pattern that is produced?
- A1.8°
- B3.5°
- C18°
- D38°
As printed in the paper
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Correct answer: D. 38°
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