The most important part of any microwave oven is the magnetron. The frequency of microwaves for household purposes is 2450 MHz. The power of the magnetron in modern devices is 700-1000 W. To ensure that the magnetron does not overheat, a fan is often installed next to it. In addition to cooling the magnetron, it provides air circulation inside the microwave. This also contributes to a more even heating of products.
In the oven, microwaves are fed along the waveguide. It is a channel with metal walls. They reflect the magnetic radiation. Under the action of microwaves, the molecules in the products begin to move quickly. Between them there is friction, as a result of which heat is released – we remember physics.
It is warm and serves for food warming. The peculiarity of microwaves is that they do not penetrate inwards deeper than 3 cm. Simply put, the rest of the product is heated from the surface layer. Heat further penetrates due to thermal conductivity. The product is placed on a rotating plate. Constant rotation is also intended for even cooking.
For the same reasons, liquid products, such as soups, are best stirred occasionally, taking out a saucepan from the oven from time to time. By doing so, you will help penetration of heat into the depth of the container with soup.
From microwave we are protected by the microwave door. In addition, it provides an overview.
It has a special design – consists of glass plates, between which there is a metal grid. Such a grid perfectly reflects microwaves inside the microwave. Small holes allow you to monitor the cooking, but they do not release the microwaves.
A special seal is attached around the perimeter of the door. It also protects us from microwaves. If the seal is damaged, the appliance cannot be used.
Since the metal reflects microwaves – the metal dishes as a rule are not suitable for cooking in the oven.