Higher Physics

Particles and Waves - Activity 3A

Interference of light

Aim - To  investigate the interference pattern produced by a double slit, using laser light.     Instructions 
The laser produces coherent light of wavelength 632 nm.
  • Switch on the laser and observe the interference pattern.
  • Describe the pattern produced on the screen, noting any change in intensity across the pattern.
  • Confirm that the spacing between points of constructive interference is as expected.
Copyright Physics Support Materials 2000