Which scientific discovery directly led to the development of microwave ovens as consumer products?

Many everyday consumer products we take for granted are actually the result of significant scientific innovation. This poll tests your knowledge of how science has transformed the retail landscape through groundbreaking product innovations that changed how we live. Can you identify which scientific breakthrough led to a revolutionary consumer product?

This is a live public trivia poll on AIPolls.Net. Vote and see real-time results.

Radar research during World War II when Percy Spencer noticed a chocolate bar melting in his pocket near magnetron tubes
James Clerk Maxwell's electromagnetic wave theory experiments with heating applications in the early 1900s
Marie Curie's radiation research that showed certain frequencies could heat food more efficiently than conventional methods
NASA's space program developing quick-heating technology for astronaut meals in the 1960s