Depends on the camera exposure time… Probably a digital camera. What would the exposure time be?
From: ChemE Stewart The photo is an average of radiation from 50 Hz cycles, not instantaneous...temp does not swing that quickly...?... If you zoom in very closely on the hot reactor photos you can see the the dark lines are of uniform width, continuity and shade. If this is 3-phase 50-cycle, then the photo should be showing the gap of the odd phase at any instant, which gap moves in one direction or the other, which is the marquee-effect of 3-phase (effective directionality). Thus one expects non-uniform width and continuity of the conductors … this is really 3-phase, no?
