Why do microwaves operate at 2.45 GHz?

The resonant frequency of water molecules is 2.45GHz, so that’s the frequency the oven has to work at . All a microwave oven does is make the water molecules take on more energy, effectively steaming the food from the inside out.27 Şub 2021

Microwave oven Microwave ovens operate by emitting a very high power signal in the 2.4 GHz band . Older devices have poor shielding, and often emit a very “dirty” signal over the entire 2.4 GHz band.

Following international conventions, microwave ovens at home or in restaurants operate at frequencies of about 2.45 GHz , i.e. λ = 12. 23 cm.