Physics 9702 · AS & A Level · The diffraction grating

The diffraction grating — practice question

An experiment using a diffraction grating is arranged with yellow light of wavelength $600\,\text{nm}$. The grating has a slit separation of $2.00\,\mu\text{m}$. What is the angular separation $(\theta_2-\theta_1)$ between the first-order and second-order maxima for the yellow light?

  • A$17.5^\circ$
  • B$19.4^\circ$
  • C$36.9^\circ$
  • D$54.3^\circ$

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