“Nontransparent” Microwave Door
One more essential, but very often unnoticed detail in our everyday living is a microwave door. Actually, it is not a door itself, but a black grating on it, which is called a Faraday shield. The door has this shield not for aesthetic perfection, but for a very practical reason. The Faraday shield assures our safety: it does not allow electromagnetic fields escape the microwave and hurt those who are waiting in front of it for their food to be ready. At the same time, with a Faraday shield your food is cooked faster and more evenly.
If you are the sort of person who has a strange yearning for seeing inside the microwave, now you know why you will never be able to do that. After all, there is a more rational way to check the readiness of your food.