Question

Maxwell’s Equations and Hertz’s Discoveries(17)
Review. A microwave oven is powered by a magnetron,an electronic device that generates electromagnetic waves of frequency $2.45GHz$. The microwaves enter the oven and are reflected by the walls. The standing-wave pattern produced in the oven can cook food unevenly,with hot spots in the food at antinodes and cool spots at nodes, so a turntable is often used to rotate the food and distribute the energy. If a microwave oven intended for use with a turntable is instead used with a cooking dish in a fixed position, the antinodes can appear as burn marks on foods such as carrot strips or cheese. The separation distance between the burns is measured to be $6cm\pm 5\%$. From these data, calculate the speed of the microwaves.

Answer 1