Saturday, 11 October 2025

slice of time (12. 786)

Whilst having been demonstrated through several experiments—the central consequence of Albert Einstein’s special theory of relativity—as an object accelerates close to the speed of light it experiences time differently and becomes stretched through time dilation, the Doppler effect, spaghettification, etc, one conjecture, independently concluded by physicists James Terrell and Roger Penrose (see previously here and here), evaded observation: that the fast moving object out to appear not elongated nor contracted despite the physical deformation but rather rotated. Utilising a battery of tricks to simulate light speed slowed down to two-metres per second in the laboratory, we learn via Damn Interesting, recording the flashes of a laser reflected off a target wire frame cube with an advanced high-speed camera, researchers at the Technical University of Vienna have reproduced the rotation for the first time. Despite the object approaching head-one, instead of seeing one face of the cube distorted, one sees a corner formed at the convergence at the vertices of two faces. This simulation is akin to photographing a rocket whizzing by at ninety-percent the speed of light with the resulting panoramic image twisted as Penrose predicted. It is a pretty nifty set-up and a way to magnify or minimise the unachievable but seems strange to have arrived at (not discovered) this anticipated effect through brute force of better lenses rather than by reason and the scientific method.