The angular separation \(d \theta\) between two wavelength \(\lambda\) and \(\lambda+\mathrm{d} \lambda\) in a diffraction grating is directly proportional to

• A

  frequency of light
• B

  grating element
• Correct answer
  C

  spatial frequency of grating
• D

  wavelength of light

Hence, the correct answer is option: 'C'.