Is it possible to interfere two light waves in the time domain? Does anyone has come across an experiment like this? 1. Treat time as the fourth dimention of space. 2. Consider two slits of time duration T1 seperated by time delay T2. 3. Make sure the wavefront emerging from the two time slits do undergo diffraction (time domain). 4. The two emitted wavefronts will broaden in time domain and hence interfere in the overlapped time region. 5. What do we expect: A beat pattern of varying intensity in the time domain if the slit widths and gap are appropriate(?). The pattern may be simmilar to the one we observe in double slit experiment in the space domain.