One of the more lively discussions on this forum since I joined June last was one about Minkowski space-time. Several misconceptions I previously had about space-time have been wiped clean. One of the first misconceptions to fall was the utility of Minkoski's "light cones". Once a pulse of light is emitted (in every direction) from an ideal point source by an event in Minkowski's version of space-time, it is impossible ever to catch up with the trailing edge of that event starting from the same point some time interval after the event occurred, much less overtake it. Another related misconception is the idea that the entire universe appears as a 2D flat pancake perpendicular to the observed direction of relative motion approaching c. Oh, the length contraction and time dilation effects are real enough by any standard of physical reality, and have been shown to be the case for any number of experiments to test them. Pick any single direction and observe distant objects in our universe receding or approaching us (but not using parallax like a range finder). Yep. They appear to be flat alright. With parallax, whole galaxies actually would appear to be flatter also, and the spaces between them too, no doubt. The images thus obtained will be Doppler shifted as well. The proton pancakes in the LHC are close-up examples that we can actually observe contracting with increasing collider energies. But these are simpler Lorentz effects, not strictly associated with Minkowski's ideas. So I need to vet a thought experiment that occurred to me that had not been previously discussed. Although the Poynting vector (direction of propagation) of light in a vacuum was discussed in association with Minkowski's thread and others, something has always bothered be about diagrams depicting a propagating wave of linearly polarized monochromatic light, traditionally depicted as phase shifted sine waves (one for E, one for B) oriented as mutually orthogonal components of a traveling wave. If a photon of light had a wave behavior as indicated by such diagrams, it would mean that a time interval delta t would be involved. But this depiction of a traveling light wave isn't the "real" physical case, is it? For one thing, for something that is presumably moving in a trajectory that is along an ideal straight line, we could, intellectually at least, take this model to the infinitesimal limit (no time interval) in the single dimension it represents, and create a slow motion film, frame by frame. In the 21st century, the sort of high speed photography that led to fame for EG & G has been supplanted by much higher exposure speed experiments like this one: which demonstrates that pulsed light scattered along the path of a high energy beam through a liquid can indicate its position as a function of time. So our instrumentality has improved to the point that if there is something wrong with this model, we should already know about it, right? I wish to understand whether there is a limit to the narrowness of the light pulse below which nothing can propagate. I'd also like to see experiments like this one recast for the double slit experiment, and also for simple reflection from a mirror. This video is old now. Does anyone have links to videos of updated and/or more elaborate experiments with light pulses?