You can use chocolate, cheese, or even marshmallows to microwave at the speed of light. Your microwave has its wavelength listed somewhere, and it's easy to multiply the rest. Also, you can still eat ...

Since their introduction in 1967, microwave ovens have become an essential appliance in kitchens both commercial and residential. These devices produce a type of electromagnetic radiation known as ...

There's a widely reported claim that you can't heat something hotter than the sun using sunlight: https://what-if.xkcd.com/145/ The idea seems to be that no (passive ...