Scientists just overturned a century-old physics assumption

Carnegie Mellon University researchers have overturned a century-old assumption about the Hall effect, a foundational physics principle used to study how materials behave electrically and magnetically. Scientists long believed the Hall effect only worked with magnetic fields applied in one direction, but the team proved it also works with fields applied in-plane. This breakthrough means a single ultrathin sensor could detect magnetic fields in multiple directions, potentially simplifying electronics, transportation systems, and medical imaging technology.