Physicists have passed light waves through "slits in time".

The study was based on a variation of the famous double slit experiment first performed by Thomas Young in 1801. The scientist discovered the dual nature of light as particles and waves. Today, physicists have new instruments and materials to explore how light will behave if it is "subjected to double-slit interference in the time domain." The results of these experiments pave the way for the creation of new technologies based on optical phenomena. Now physicists are looking to replicate the time crystal experiment.