electromagnetic-waves

From Hülsmeyer's 1904 ship detector to Watson-Watt's Chain Home network, radar reshaped warfare, aviation safety, and meteorology in under a century.

How Guglielmo Marconi's 1895 wireless experiments — and a disputed 1943 Supreme Court ruling crediting prior patents — built the radio into the foundation of all modern wireless communication.

How microwave ovens heat food at 2.45 GHz, why metals spark, what's safe to microwave, and a comparison with convection, induction, and gas.