Waves that are are micro🤔?yes MICROWAVES
Microwaves are a form of electromagnetic energy or radiation. In terms of frequency (oscillation rate) and wavelength, there are microwaves in the electromagnetic spectrum between infrared rays and radio waves.
There are two types of electromagnetic radiation: ionizing and non-ionizing. Ionizing radiation includes X-rays and gamma rays at one end of the spectrum. Non-ionizing radiation, which makes up the rest of the spectrum, includes ultraviolet light, visible light, infrared rays and radio waves. (And between the last two we find "microwaves.") The terms ionizing and non-ionizing indicate an important difference.
Ionizing radiation can remove electrons from atoms and create highly unstable, chemically reactive, electrically charged atoms, so-called ions. In other words, ionizing radiation always damages cells in living tissue and can cause genetic mutations. Any exposure to this type of radiation, no matter how small, carries some risk.
Microwaves, on the other hand, are non-ionizing energy. In fact, they are much less powerful and do not have enough energy to remove electrons from atoms, so humans feel relatively free to use this form of energy for its benefits.
What are they worth?
About 50 years ago, there were no artificial microwaves. Only small amounts of microwave radiation from the sun and other sources in the Earth's galaxy entered our atmosphere. But then, before World War II, radar evolved. This is how microwaves were made available to the public for the first time because they were used by radar. In recent years, human ability to generate and use microwaves has led to such a proliferation of microwave devices that almost everyone on earth is affected by them today.
In some urban areas, microwave radiation and associated high-frequency radio-frequency radiation are estimated to be up to one billion times or more than what occurs naturally in the environment. And the sources of this type of radiation are increasing rapidly in many places.
Almost all airports now have radar navigation systems that use microwaves. In addition, the police radar operates on microwave frequencies. In addition to radar, very high-frequency television signals are also transmitted by microwaves. Long distance calls can be made from one city to another in the form of microwave radiation. Microwave ovens are becoming more and more popular. Computers in one city can use microwaves to transfer data to computers in another city. Satellite transmission, monitoring and communication systems use microwaves, as do some air pollution control systems. Telephone booths used to help motorists on the roads to use the microwave oven. Many burglar alarm systems use them, as do some automatic garage door openers.
The military, by far the largest user of microwave equipment in today's electronic war world, uses microwaves for tasks such as radar tracking and scanning, nuclear and anti-missile control systems, tankers and listening devices.
The medical world has uses for microwaves: for sterilization, for experimental use in cancer treatment, for slowing tumor growth and in diathermy machines that heat body tissues to treat conditions such as bursitis, arthritis and muscle pain and sprains. . In the United States alone, approximately two million people are treated with these machines each year.
The industry uses microwaves to dry french fries, roasted nuts, beans and coffee, grow bread and donuts and pre-cook bacon. They are also used to dry wire, wood, paint, paper, leather, tobacco, pencils, cloth, matches and to dry rubber, nylon, urethane and rayon. Many companies such as banks, newspapers and airlines now use CRT video display devices called microwave VDTs.
Anticipated uses of microwaves include a large satellite power plant in space to harvest solar energy, convert it to microwaves, and distribute it to Earth. Here on earth, microwaves would be converted into electricity. Another envisioned use is a car radar braking system that can emit microwave radiation in front of the vehicle, detect an impending collision, and automatically apply the brakes.
In fact, microwaves have a huge impact on our lives, but very few of us really know how to do what they're doing.
How do microwaves work?
Since microwaves are basically just energy, their consumption varies. With radar, for example, microwaves are focused on sharply directed beams and directed at a target with short bursts or pulses. Microwaves are reflected off electrical conductors such as metal, so microwaves that radiate toward the target, such as B. an airplane, return to the sender. The time interval between the signal transmission and its return allows you to measure the distance to the target, because microwaves travel at the speed of light. By comparing the delay time at two different heights, you can calculate the height of the target.
The reason that energy can be used in microwave ovens for cooking is simple: although metals reflect microwaves, food absorbs them. Thus, a metal box, the oven, reflects the microwave rays which are reflected in the oven until they reach the food. Then, they are absorbed into the food, causing the moisture molecules in the food to vibrate rapidly and two and a half billion times per second. This friction creates heat and this heat is cooked. In fact, food produces its own heat.
In a microwave oven, there is very little energy wasted in the oven or in the air it contains, which is the case with traditional cooking. It is also very difficult to heat cooking vessels because the microwave uses glass, paper, or plastic that the microwave only passes, absorbs, or reflects. So if a small amount of food reaches full microwave power, it cooks very quickly.
For example, a baked potato can take 45 to 60 minutes to bake in a traditional oven. In the microwave, a potato can be cooked in about 2 1/2 to 6 minutes, depending on the size of the potatoes and the make and model of the oven. If two potatoes are cooked, the cooking time may increase from 5 to 12 minutes. The increase in cooking time is due to the fact that microwave energy splits into two forms rather than the total amount absorbed by the potato. This remarkable cooking speed when using microwave ovens is the main attraction.