Well before reading the article I was struggling to imagine how to film light - after all either a photon hits the sensor or it doesn't. How would you photograp

Well before reading the article I was struggling to imagine how to film light - after all either a photon hits the sensor or it doesn't. How would you photograph a photon in mid-flight? You can't, because if it is in mid-flight, it is obviously not on your sensor. So this (presumably correct) explanation is a relief for me.