Optics2026-03-161 minarXiv:2603.15272expressLaser Gauge for Supersonic SpeedsA supersonic gas jet is like a highway where some cars zoom past faster than sound while others crawl. Measuring each car's speed at once without disrupting traffic is a tough challenge.Atulya Kumar·Gabriel Alfaro·Marios Kounalakis·Stefan Karatodorov·Alexandros GerakisChristian DopplerCharles TownesAlbert EinsteinradarlaserTime dilationturbulencespeed of light👍👎☆SimplePopularAdvanced