In physics, wave-particle duality holds that light and matter can exhibit properties of both waves and particles. But how can this be?
This is one of the most mind boggling videos I have watched and it interests me immensely because of the section on interference patterns. Although the video is talking aobut quantum physics, interference patterns show up in the underwater world of sonar because of the Lloydd Mirror Effect- basically, sound is reinforced or cancelled out by sound waves of inverse proportion.
Light and matter makes interference patterns also in this dual slit experiment however, when the process is observed, the particles behave differently- like they know they are being watched!