Microwave devices are very popular these days due to their high speed of operation, and some even use them to brew tea. Of course, tea fans believe that this drink has a different taste when it is present in the kettle, and now research has been done which shows that this statement is not baseless and tea should not be heated in the microwave.
In fact, when water is heated in a kettle on the stove, a process called convection occurs; This means that the water in the lower part of the kettle, which is heated and less dense, gradually begins to move towards the upper part of the container. As a result, the colder water at the top of the kettle goes down and starts to heat up. At the same risk, the water heats up evenly and your tea has the same temperature.
Researchers at China University of Electrical and Technological Studies have found that water near the surface of a container placed in a microwave oven is much hotter than water at the bottom of a container. This is because, unlike a kettle, your entire cup or cup of tea heats up in the microwave and the heat does not just enter the bottom. Therefore, in the first few cups, the water is warmer and then cools when it reaches the end of the drink.
However, the researchers note that there is little difficulty in heating tea in the microwave. They say that by placing a special plate made of silver near the walls of the microwave in such a way that it acts as a shield for water, it is possible to prevent the water from heating up from the top surface of the glass. Be careful not to put metals in the microwave at home. Scientists performed very precise geometric calculations to prevent the silver plate from igniting and catching fire in the microwave. After designing the metal structure in the right size, they placed it in a part of the microwave that had a weaker field and the possibility of the metal plate catching fire was low.
It is expected that in the future, this finding will be used by researchers in a wider field other than tea heating. With the help of their findings, they are now trying to make new accessories for heating liquids in the microwave.
However, it is much more difficult to make dishes that heat food evenly in the microwave. Solid foods, like liquids, do not follow the law of convection, and on the other hand, innovative methods for uniform heating of food in these devices are very expensive.