When the microwave oven isn't running, it's not radiating anything.
When the PC is on, it's monitoring the presence of the WiFi signal, ready
to connect when you want it to. Even when you're not connected, you
can see a little icon at the bottom of the screen that tells you that there
is a WiFi signal available.
The answer is yes.
A microwave convection oven is a kitchen appliance that combines the functions of a microwave and a convection oven. It uses both microwave radiation and hot air circulation to cook food quickly and evenly. This differs from a traditional microwave, which only uses microwave radiation, and a traditional oven, which only uses hot air for cooking.
No, both light in air and radiation from a microwave oven travel at the speed of light in a vacuum, which is approximately 299,792 kilometers per second. Therefore, they both travel at the same speed.
Both visible light and microwave radiation are different variations of the same electromagnetic energy. Visible light has infinitesimally small wavelengths, and therefore it can pass through the screen holes. Microwave radiation has much larger wavelengths, and these wavelengths are too big to "fit" through the screen holes, and therefore the screen appears solid to the microwave radiation. The microwave radiation is therefore completely reflected by the screen.
Both microwave radiation and nuclear electromagnetic radiation are members of the same species, but they're as different as babies are from elephants, to wit, microwaves are much, much less powerful than nuclear electromagnetic radiation. Microwave radiation, for instance, makes atoms shift their position (and magnetic fields) very, very quickly. Now the definition of heat is "movement," so the faster anything moves, the "hotter" we say it is. Ergo, something placed in a microwave-radiation-field becomes noticeably "hotter." But comparing microwave and nuclear electromagnetic radiation is like comparing a face-slap to a 20-ton BOMB. Nuclear radiation comes from atomic nuclei, so "nuclear radiation" can strike, penetrate, damage, and even destroy atoms in their path. Big difference, capiche? Huge.We left out the part about nuclear particulate radiation. There is no comparison there. Additionally, nuclear electromagnetic radiation is ionizing radiation while microwave radiation is not.
Microwaves are electromagnetic radiation. They are electromagnetic waves, and they are transmitted like light or radio waves, both of which are forms of electromagnetic radiation. The radiation leaves the microwave source in waves, and this radiation will travel effortlessly through a vacuum, and with a bit of loss through air.
The word "microwave" can function as a noun or a verb. As a noun, it refers to an appliance that cooks or heats food using microwave radiation. As a verb, it means to cook or heat food using a microwave oven.
Yes, a microwave uses electromagnetic radiation in the form of microwaves to heat food by exciting the water molecules inside it. This process converts the energy from the microwaves into heat, effectively cooking the food.
Yes, all of those are forms of electromagnetic radiation. The glow from a fireplace is infrared radiation, the energy within a microwave is microwaves, and a foghorn blast is sound waves, which are a type of mechanical wave that consists of both pressure waves and electromagnetic waves in the form of radio waves.
Plates are usually either ceramic or glass. Both materials are transparent to the microwave radiation in a microwave oven. The electromagnetic energy goes right through the plates like they weren't there. It is the food that heats the plate as that food is being heated. Remember that the microwave radiation is "tuned" to work on the hydrogen-oxygen bonds in water. It gives them "energy" and heats them up. There are some plates that will actually get a bit hot directly from the microwave energy, but that depends on the composition of the plate.
Plates are usually either ceramic or glass. Both materials are transparent to the microwave radiation in a microwave oven. The electromagnetic energy goes right through the plates like they weren't there. It is the food that heats the plate as that food is being heated. Remember that the microwave radiation is "tuned" to work on the hydrogen-oxygen bonds in water. It gives them "energy" and heats them up. There are some plates that will actually get a bit hot directly from the microwave energy, but that depends on the composition of the plate.
Using a microwave is a physical change because it involves the application of electromagnetic radiation to heat and cook food. Chemical changes would involve alterations to the molecular structure of the food, which typically does not occur solely due to microwave heating.