0
Want this question answered?
Be notified when an answer is posted
Add your answer:
Earn +20 pts
How is the electromagnetic energy from the microwave transformed into heat energy?
It is absorbed by the food.
Energy transformations for a microwave?
Electric energy turns into microwaves, which then is absorbed as heat.
What does the microwave oven's ability to cook food partly depend on?
Are absorbed quickly by water molecules
Do the sunbeams absorbed by the earth get radiated as a different kind of radiation?
They mostly get radiated out as Infra-red (Heat) and microwave radiation
Can coeliacs use microwave wheat cushions?
As long as they don't eat it yes. The particles of wheat are to big to be absorbed by the skin.
What happens when you put metal submerged in water in a microwave?
If metal is left unexposed in a microwave oven, the metal will deflect the microwaves and cause sparks. However, if it is submerged in water, the microwaves dissipate and are absorbed by the liquid. In turn, the water is heated.
What heat transfer uses electromagnetic waves to increase thermal energy?
Microwave Radiation is Very Effectively absorbed by Water molecules, this results in the increased thermal agitation of the Water molecules that absorb the Mw radiation - as found in Microwave ovens.
When can't microwaves be absorbed?
Microwaves are not absorbed by (pure) microwave transparent materials like glass, quartz, etc. Even "transparent" materials like Lead Glass begin to absorb, proportional to the impurity. The answer is not quite correct. Glass, even in its purest form, does absorb microwaves to very small extent. This is measured by something called the attenuation coefficient, which effectively describes the depths at which 63% of the energies has been absorbed. In the case of glass, this depth is extremely large, however, there is some small amount of absorption. In my laboratory we have melted Pyrex beakers in a domestic microwave oven. As to Quartz, its penetration depth is much much greater than glass, so it is, in effect, very transparent to microwave energy at the frequencies used for microwave heating. This is why Quartz is often used to create a microwave windows in high vacuum situations. Metals are extremely reflective of microwave energy, especially those that are nonmagnetic. But even here, there is some very small amount of absorption in something called the "skin depth".
Why are microwaves good?
Most people use the microwave to heat coffee or make popcorn. But it can do so much more. For example, it is use for any recipe that calls for braising, poaching, or steaming. Remember to take the food out a minute or two before it's completely done. As soon as the microwave energy is absorbed by the food, it is converted to heat so the microwave energy can not contaminate the food.
What does microwave stands for?
Microwaves are wavelengths of light that are shorter than radio waves, but longer than infrared light waves. The wavelength range is 1 meter to 1mm. One particular wavelength is optimum for being absorbed by water, and this is what "microwave ovens" are tuned to produce. This is 2.45 GHz, which is about 12.2cm wavelength.
What a microwave can do?
A microwave is, in fact, a microwave
How must microwaves interact with matter if they cause food and most containers to heat up in a microwave oven?
The waves of energy must be absorbed by the food so that the energy the wave was carrying is transferred as heat.
