Skip to main content


Learn how light can be described as a ray or wave and how you manipulate light with lasers and optical lenses.
Level 2 (without higher mathematics)

Classical Double-Slit Experiment explained simply in 16 minutes!

In this video, Young's double-slit experiment with light is explained in a simple way. How the interference pattern of the double-slit is formed and which role light diffraction plays.

Content of the video
  1. ⏲ [00:12] A bit of history
  2. ⏲ [02:13] Setup + observation
  3. ⏲ [03:43] Interference and wave path difference
  4. ⏲ [05:26] Interference pattern explained
  5. ⏲ [11:23] Derivation (formula for wavelength)