What is electromagnetic interference (EMI)?

Kshitij Pandey on Instagram: "In 1999, physicist Lene Hau at Harvard did something once thought impossible she slowed light from 300,000 km/s to just 17 m/s, and later even stopped it completely. Using an ultra-cold cloud of rubidium atoms and a technique called Electromagnetically Induced Transparency, her team managed to store the information carried by photons inside atoms and release it again on demand. This wasn’t just a physics marvel it laid the groundwork for quantum memory, secure commu