Microwaves essay

One should notice that this whole process of heating is different than the conventional gas or electric oven process in that in the former, one is exciting the atoms making them hot wherever there is H2O, whereas in the latter, one is conducting heat from the outside towards the inside.

The microwave oven had become a necessity in the commercial market and the possibilities seemed endless. By having a microwave oven available, restaurants and vending companies could now keep products refrigerator-fresh up to the point of service, then heat to order. Pagpili ng kurso sa kolehiyo research paper Pagpili ng kurso sa kolehiyo research paper double spaced written essays.

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Microwave Ovens

The magnetron tube had to be water-cooled, so plumbing installations were also required. Microwaves distort the molecular structure of the foods and they destroy much of the nutrients and cause many other problems with the immune system over a period of time. Gamma rays are given off by stars, and by some radioactive substances.

In Raytheon introduced the first countertop, domestic oven. This faint background radiation, which fills the universe and is almost the same in all directions, is "relic radiation" from the Big Bangand is one of the few sources of information about conditions in the early universe.

In time, microwaves were being used to dry cork, ceramics, paper, leather, tobacco, textiles, pencils, flowers, wet books and match heads.

It is a diode-type electron tube which is used to produce the required MHz of microwave energy. When they sweep at a point that there is excess negative charge, this negative charge will push back around the cavity, and impart energy to the oscillation at the natural resonant frequency of the cavity.

One major disadvantage of this method is that the microwave energy might be concentrated at various points resulting to localized heating. Due to the high cost and maintenance requirements of waveguide runs, in many microwave antennas the output stage of the transmitter or the RF front end of the receiver is located at the antenna.

The microwave oven had become a necessity in the commercial market and the possibilities seemed endless. This frequency will keep pumping in the cavity by a process called thermionic emission.

Microwaves are especially suitable for this use since they are more easily focused into narrower beams than radio waves, allowing frequency reuse ; their comparatively higher frequencies allow broad bandwidth and high data transmission ratesand antenna sizes are smaller than at lower frequencies because antenna size is inversely proportional to transmitted frequency.

Industries began using microwaves to dry potato chips and roast coffee beans and peanuts. And he watched as the egg began to tremor and quake. Typical Microwave Oven As mentioned previously the magnetron produces the microwaves.

In time, microwaves were being used to dry cork, ceramics, paper, leather, tobacco, textiles, pencils, flowers, wet books and match heads.

Microwaves

Why do microwave ovens produce these electromagnetic waves with a frequency of 2. As the food industry began to recognize the potential and versatility of the microwave oven, its usefulness was put to new tests. The waves are being absorbed by water molecules in the food which make them vibrate causing them to rub against each other producing friction.

Those characteristics are present around us on a regular basis; even in this very course Elec The dielectric properties of food relates on its ability to store microwave energy.

The heat developed in these materials is from the heat of the food only. Military communications run primarily over X or Ku-band links, with Ka band being used for Milstar. Percy Spencer, an engineer with the Raytheon Corporation, noticed something very unusual. Long distance radars use the lower microwave frequencies since at the upper end of the band atmospheric absorption limits the range, but millimeter waves are used for short range radar such as collision avoidance systems.

Microwave Oven Essay Sample

X rays were invented completely by accident in when a German physicist named Wilhelm Roentgen made the discovery while experimenting with electron beams in a gas discharge tube.

Now, with all this knowledge in our possession, how does all of this cook the food. Microwave radio is used in broadcasting and telecommunication transmissions because, due to their short wavelength, highly directional antennas are smaller and therefore more practical than they would be at longer wavelengths lower frequencies.

Not surprisingly, initial reactions were unfavourable; consumers were highly reluctant about these first units. The principle behind electromagnetic cooking is naturally dielectric heating. The magnetic field is provided by strong permanent magnets, which are mounted around the magnetron so that the magnetic field is parallel with the axis of the cathode.

Now the invention boomed. Typical Microwave Oven As mentioned previously the magnetron produces the microwaves. Other industries found the diverse applications of microwave heating quite advantageous. And so they found only limited acceptance. Technological advances and further developments led to a microwave oven that was polished and priced for the consumer kitchen.

Microwave heating is used in industrial processes for drying and curing products. The price and easy installation of countertop microwaves is appealing.

Microwave Ovens

Just plug one into an ordinary outlet. But be aware that they eat up counter space, so zero in on each model's usable. Microwave oven is a kitchen appliance which cooks food using microwave energy. Microwave oven is quick and efficient equipment because it transfers heat energy directly to the molecules inside foods.

Microwave is a form of electromagnetic radiation which is very close to radio waves and sunlight.

Microwave Oven Essay Sample

Microwave oven has shortened the time to prepare food. Microwaves History of Discovery: In James Clerk Maxwell predicted the existence of electromagnetic waves/microwaves. Then in Heinrich Hertz was the first to demonstrate the existence of microwaves by building an apparatus that detected and produced microwaves in the UHF region.

Microwave ovens A microwave oven cooks food using electromagnetic waves quickly by penetrating the food and cooking it from the inside as well as from the outside without heating the oven and the container of the food - Microwave ovens Essay introduction. Microwaves does not pass through metal but passes through plates and dishes.

Microwave Oven Essay Sample. These days, in many homes, it is virtually impossible to have a so called modern kitchen, without having a microwave oven in it. Microwaves Many Americans definitely have a microwave at home, because microwave ovens are very convenient compared to conventional ovens.

Microwave ovens Essay

Microwave was banned by Soviet Union, inwhy? Too much usage of microwave is bad for health. We will write a custom essay sample on Effects of Microwave Oven specifically for you for only .

Microwaves essay
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