Physics (AS & A Level) · Oct / Nov 2022 · Paper 11 · Question 30
A diffraction grating has 4.00 × 10^5 lines per metre. A beam of light of wavelength 589 × 10^–9 m is incident normally on the diffraction grating. What is the angle between the second-order maximum and the direction of the incident beam of light?
- A13.6°
- B27.3°
- C28.1°
- D56.2°
As printed in the paper
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Correct answer: C. 28.1°
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