🔤 EHT A–Z We’re breaking down the science behind the Event Horizon Telescope - one letter at a time. 📡 P is for Polarization Light is an electromagnetic wave, meaning its electric and magnetic fields oscillate as it travels through space. The orientation of these oscillations - their polarization - depends on how they line up with our line of sight. By measuring polarization, we can uncover clues about the environment where the light originated. It’s one of the key ways the EHT learns what’s h