Diffraction Gratings

• Diffraction grating


  A device that splits and diffracts light into several beams travelling in different directions
• Diffraction grating

  • N lines per m
  • (lines per mm) => d = 1/N
• The light waves diffracted through angle θ constructively interfere to form the nth order diffraction spot
• When the light waves diffracted through angle θ


  They constructively interfere to form the nth order diffraction spot