Ever wondered how light and matter interact at the subatomic level? Join us on this episode of Subatomic Tanvi as we delve into the fascinating world of Quantum Electrodynamics (QED)! We'll explore the mind-bending concept of particles existing in multiple places at once, learn how QED predicts these interactions using probabilities, and even decipher the "rulebook" of this quantum world – the Lagrangian Density. We'll unravel the mysteries of Feynman Diagrams, visual representations of particle interactions, and discover how they illuminate the bizarre dance of light and matter. Get ready for a journey beyond classical physics, where basketballs become probability clouds and billiards unlock the secrets of the subatomic realm!