A-LevelPhysicsSuperposition9702/12 · May/June 2021 · Q291 Mark
A parallel beam of light consists of light of wavelength 420 nm and light of wavelength 630 nm. The light is incident normally on a diffraction grating. The diffraction maxima for the two wavelengths overlap only at an angle of 31° from the direction of the incident light beam. What could be the line spacing of the diffraction grating?
A1.2 µm
B1.6 µm
C2.4 µm
D3.7 µm
✓ Correct answer
C: 2.4 µm
Practise more questions on this topic
Oracle Prep sorts past-paper questions by topic, so you can drill Superposition and see which topics are most likely to come up next.
Sign up free →