“The Feynman Lectures on Physics Vol. I Ch. 28,” explores the synthesis of electricity, magnetism, and light into the concept of electromagnetic radiation. It highlights James Clerk Maxwell’s pivotal 19th-century discovery, which unified these forces and predicted the existence of electromagnetic waves, explaining phenomena like radio transmission and the propagation of light from distant stars. The text then presents the fundamental equations governing electromagnetic fields generated by moving charges, emphasizing the “retarded time” concept, where observed effects depend on the charge’s past behavior. Finally, it details experiments using dipole radiators to demonstrate and verify the properties of electromagnetic waves, including interference and the vector nature of field addition, underpinning our understanding of light and radio propagation.