Physics 9702 · AS & A Level · The diffraction grating

The diffraction grating — practice question

Light with one wavelength is directed normally onto a diffraction grating. The diffraction pattern produced is shown on a screen. Which alteration would make the first-order intensity maxima lie farther apart on the screen?

  • Aplacing the screen closer to the diffraction grating
  • Busing a diffraction grating with less separation between adjacent slits
  • Cusing a diffraction grating with more slits but keeping the same separation between adjacent slits
  • Dusing light with a shorter wavelength

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