Any slice of cheese should do it. Just put it on the microwave for a while (you'll need a bit of testing, and then measure the distance between two points that haven't melted and use that as the wavelenght of the microwave. Won't work with a rotating plate though
Fun fact: if you know your microwave frequency you can actually estimate the speed of light with a piece of cheese, with <20% error
What kind of cheese?
Any slice of cheese should do it. Just put it on the microwave for a while (you'll need a bit of testing, and then measure the distance between two points that haven't melted and use that as the wavelenght of the microwave. Won't work with a rotating plate though
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