Does food in a microwave oven absorb microwaves?
Yes, items in a microwave oven can be said to absorb microwaves. The microwave energy causes what is called dielectric heating, and this activity takes energy from the microwave beam.
A microwave uses microwaves (hence the name) to cook food, microwaves penetrate most food substances and cook 'from the inside out'. An oven uses heat waves which in simplistic terms are waves that heat the substance 'from the outside in'. Unlike microwaves heat waves do not penetrate.
Yes, microwaves inside of a microwave oven do indeed pass through a material - for example - a glass casserole dish or other cooking vessel - to reach the food inside the vessel to begin the cooking process. The microwaves also pass through paper, plastic and similar materials - that is why one can cook with such materials in a microwave oven. Microwaves however do not pass through metal objects, but rather often cause arching… Read More
A convection microwave uses both microwaves and convection heating to cook the food. The convection cooking allows the food to be browned and cooks the outer part of the food while the microwaves cook the interior of the food.
Cooking food with microwaves was discovered accidentally in the 1940s.
A)Microwaves are electromagnetic waves. The microwave oven generates these and directs them into the cavity where food is placed. The microwaves act on the water molecules in food, and because the water molecules are polar, they will attempt to orient themselves according to the passing microwaves. Because the microwaves are waves, they have crests and troughs, and these will cause the water molecules to "flip" continuously. This generates heat, and the heat warms the food.
Microwaves are electromagnetic waves. The microwave oven generates these and directs them into the cavity where food is placed. The microwaves act on the water molecules in food, and because the water molecules are polar, they will attempt to orient themselves according to the passing microwaves. Because the microwaves are waves, they have crests and troughs, and these will cause the water molecules to "flip" continuously. This generates heat, and the heat warms the food.
A microwave oven is 70 percent efficient if it is supplied with 4000 jouls of electrical energy how much heat is used to actually cooked the food?
A microwave oven does not use heat to cook food like a conventional oven, instead it uses microwaves to cook the food. The microwaves produce the heat inside the food, thereby cooking the food from the inside out.
Plastic or glass allow the microwaves to penetrate the food and heat it. Metal reflects the microwaves and can damage the microwave oven. Some plastics can melt from heat transfer so glass is best.
The benefits for employing a Commercial Microwave Oven include that the microwave oven can heat your food without becoming hot itself thus eliminating the chances of burning yourself on the sides of the oven. The cookware is also cooler than the food due to the fact that is transparent to microwaves. Microwaves also cook your food faster than a traditional stove.
Yes, since the oven heats food by irradiating it with microwaves. Microwaves are an example of electromagnetic radiation, having a frequency lower than that of visible light.
A turntable in a microwave oven rotates the food being warmed or cooked, with evenness of heating being the aim. A microwave oven is a sealed box, a Faraday cage, into which microwaves--nonionizing radiation of about 2.45 GHz frequency--are injected. The microwaves are generated by a magnetron and fed into the box at only one point via a waveguide. So better ovens will use a microwave stirrer, a turntable, or both to help the microwaves… Read More
No, microwave ovens are constructed in such a way that no 'microwaves' can escape the oven, so your food or anything else stored close by are safe.
Microwaves heat food by heating the moisture in the food. If the microwave does not have a browning element in it, there is nothing to cause the food to brown. Some foods can be browned in a microwave oven, if there is some fat content. But this may also over cook the food.
Because a microwave oven does not target one area of the oven, microwaves are random and a revolving tray captures more microwaves.
yes its does because when the microwave is on and the plate is rotating,the light is actually heating the food. It is not the visible light that does the heating, that is provided simply so you can see inside the oven. It is the microwaves that do the heating, by agitating molecules of water in the food. That's why you can't heat dry food in microwave oven. The microwaves are EM radiation like visible light… Read More
The microwave oven uses radiation in the range of microwaves in order to provide energy and heat food, cooking it. Most people simply don't add the word oven to avoid confusion.
Can you leave plates of food to be eaten later on-top of a microwave if the microwave is used in the mean time will it not keep reheating the food on top of the microwave?
Microwaves should not be leaking from the microwave oven, however leaving food out and not refrigerated can be a health hazard in itself.
A convection oven uses heat, like a regular oven, but sets up a convection current to move heat into the food faster. Microwave ovens use microwave radiation that causes polar molecules inside the food to move. Water being the most common highly polarized molecule in food, microwaves essentially steam food from the inside out.
Kinetic energy is the mechanical energy (thermal energy) that does the heating/cooking in a microwave oven. The microwaves that the oven generates stimulate chemical bonds in food, and this is the conversion of electromagnetic energy into that heat we mentioned.
Yes, if it is wet or if it is used to line or cover food. Microwaves pass through it.
What type of utensils you can use in microwave oven in convection modeto make cake. can you use microwave safe glass bowl which came free with microwave?
A person can use plastic bowls that come with microwaves when warming food in a microwave. Metal can not be used in microwaves, because it can cause the microwave to catch fire.
Yes. But you wouldn't want to be near it. Yikes!
No, a microwave oven does not contain a cathode ray tube. A cathode ray tube (CRT) is what is in a conventional television set. The microwave oven has a magnetron in it. The magnetron is a type of cavity resonator, and it is this electronic component that generated the microwaves that heat food items.
We find that in the microwave oven, electromagnetic energy (microwaves) are converted in thermal (heat) energy.
The microwave oven was invented in the year of 1945. It was not until the late 1960s when microwaves became available to everyday people.
A potato wrapped in paper will cook in a microwave oven, because paper does not block microwaves. A potato wrapped in aluminum foil would not cook in a microwave because aluminum foil does block microwaves.
microwave radiation can cook your food, and mobile phones use microwaves (but they need transmition towers) If you are exposed to microwaves for a long time (like pressing your face against the microwave oven to check on your food) then you can develop cataracts. Also, microwaves from mobile phones can affect certain parts of your brain, so be careful with your cellphone, especially if you're young and growing.
Microwaves are of the same frequency as the absorption spectrum of water. Anything that contains water, in a microwave oven, will bet heated as the water in it is heated. Utensils, usually, do not contain water.
Microwave ovens should not be used if the door will not close tightly. Most microwave ovens will not turn on without the door locking. The door has shielding in the glass to keep stray microwaves within the oven and not going into the room or the person operating the oven.
To keep the microwaves inside.
magnetron vacuum tube generates the microwaves controller/timer turns magnetron on/off stirrer scatters microwave radiation over food powersupply case
No, unless you are not talking about microwaves in the electromagnetic spectrum. The reason we can not see them is because they are not part of the visible spectrum. Microwaves have lower frequencies. Microwaves do use microwaves. The microwave uses microwaves to excite the water molecules making the food cook faster than a conventional oven.
There are no microwaves left in the food after cooking. Stopping a microwave oven is like shutting off a light - the microwaves disappear. As to the effect upon the body if exposed to microwaves, all they can do is heat the body. But that takes a lot more microwave power than you would be exposed to by a leaking microwave oven. Even if you could be exposed to that large amount of microwave power… Read More
No. Microwaves (not microwave ovens, the actual waves) penetrate the surface of food easily. They heat the inside of your food at the same time as the outside. Compared to a conventional oven, which heat from the outside in, microwaves are much faster. Another Opinion: Effectively Microwave Radiation does Heat the interior of an Object First and Hotter than the outside. I once overcooked Cookies in a M.W. Oven. They were burned to a CHAR… Read More
The electricity (electromagnetic energy) that drives the microwave oven is routed to the magnetron, which generates the microwave energy. (The electricity and microwave energy are both forms of electromagnetic energy.) The microwaves travel through a waveguide into the cavity (the cooking space) in the oven, and used to excite chemical bonds in the food items. This is a conversion of microwave energy (electromagnetic energy) into the mechanical energy of heat.
Microwave ovens cook food faster but are usually more expensive. Also food packages will have directions for cooking in microwaves, rarely will you find any with directions for a toaster oven. A toaster oven is a cross between a toaster and a oven. You can cook food that needs toasted in it. But you can also use it as you would a regular oven. It heats up fast so you can broil and bake without… Read More
None, Electrical energy is used to produce microwaves in a microwave oven.
A microwave oven incorporates a microwave generator which produces EM energy at the right wavelength or frequency to energise water molecules in the food being cooked, which produces thermal energy in the food. The microwaves don't escape from the oven because they don't penetrate the materials the enclosure is made from. (EM = electromagnetic)
A microwave oven uses microwaves. This is a kind of electromagnetic wave. The energy source for the microwave oven is AC (alternating current, electricity), available in many houses.
No, you shouldn't. Most ovens are built so that you can't. Opening the door turns off the oven. If the door were opened with the oven is running the microwaves aren't shielded and they could harm someone standing in front of the oven. Yes, you can but it instantly stops generating microwaves. As no microwaves are generated with the door open, a properly working microwave can't hurt anyone.
Some microwaves will have what is called a carousel, a base that you place the item to be heated on, and it will rotate, ensuring that your item receives an even dose of microwaves on all sides. Your other option would be to purchase a commercial grade microwave that is more high-powered than those that are typically used in the home. Microwave with carousel: http://www.ikea.com/us/en/catalog/products/50142337 Commercial microwave: http://www.missionrs.com/NE-1054.html Originaaly, microwave ovens used a "mode mixer"… Read More
Yes, it is very bad. When you run a microwave oven without any food inside, there is nothing to absorb the microwaves and they build up inside the cooking chamber. Eventually, something has to absorb them and that something is the oven's microwave source-its magnetron. The magnetron isn't good at handling excessive power that returns to it from the cooking chamber and it can be damaged as a result. In all my years of experimenting… Read More
Microwave ovens are not like convection ovens. They do not cook or heat food from a heat source inside the oven, so they do not have a maximum temperature. The microwaves excite water molecules in the food, causing them to move faster, thus heating up the food.
Very basically, the oven shoots microwave radiation into the food. The reason why it makes the food hotter is because microwave radiation is absorbed into water, fat, and sugars directly, causing their atoms to vibrate, which causes heat.
Inside a microwave oven,microwaves are made when electricity passes through a device called Magnetron.Magnetron uses a strong magnet. The electricity and the magnet make microwave electromagnetic.
It has a metal mesh to reflect the microwaves back into the microwave oven instead of out.
if you put food in the microwave it can kill all the nutrients and goodness, so it makes food bad for you, this is because it has like micro waves or something :S i don't know why, but i know it is much healthier to cook your food in the oven because microwaves kill off the nutrients.
Microwaves are radio waves. In the case of microwave ovens, the commonly used radio wave frequency is roughly 2,500 megahertz (2.5 gigahertz). Radio waves in this frequency range have an interesting property: they are absorbed by water, fats and sugars. When they are absorbed they are converted directly into atomic motion -- heat. Microwaves in this frequency range have another interesting property: they are not absorbed by most plastics, glass or ceramics. Metal reflects microwaves… Read More
Biscuits do not bake well at all in any sort of microwave oven. The microwaves cause the biscuits to become very hard and unpalatable.
If you mean can you put the aluminum cake pan in a "microwave OVEN", the answer is definitely NO. You will damage the oven. Here's why: Generally you cannot put material that conducts electricity inside a microwave oven. Microwaves induce electric current in moisture and fat, and the electrical resistance heats the food. Microwaves induce major current in spoons, pans, etc and this is a direct short, which quickly overloads and over heats and can… Read More