. APEX: radio waves

AM.

Microwaves are electromagnetic waves that occur on the EMR (Electromagnetic Radiation) scale above radio/tv waves and below infrared and visible light waves. They are used in cooking devices (microwave oven) and as carrier waves for cell phone and other communication devices.

In other words, a "microwave" is a type of electromagnetic radiation (like visible light waves, tv waves and so on), and a "microwave oven" is a cooking device that uses microwaves to heat foods by stimulation of the water molecule.

See the link below and read the answer posted to the related question for more.

No. Cell phones may emit cellular radiation even when "idle". Smartphones may also emit radio signals for near-field, Wi-Fi, bluetooth, Ant, etc.

Details: They emit radiation (a digital microwave signal) when they are first turned on, then continue to "check in" with a cell hub (or cell hubs if you are moving) so you are constantly connected to a cell hub. Your phone is "always ready" to receive incoming traffic because it is being "tracked" by your cellular service provider so that the nearest hub can relay your calls. If you are stationary, a single hub probably does this. But if you are mobile, cell hubs "hand you off" as you move, and all based on your phone's "checking in" signals to the hub.

100 meters and longer would be 3mhz and lower. Divide the speed of light ( C=3.0*10^8 meters per second) by the wavelength. You get frequency.

Yes. Radiations on the "red" end of the spectrum, such as radio, microwave, and infrared, have markedly less energy than visible light. Frequencies on the "purple" end, on the other hand, such as ultraviolet, x-ray, and gamma, have considerably more.

# The pattern produced on a photosensitive medium that has been exposed by holography and then photographically developed. # The photosensitive medium so exposed and so developed. Also called holograph.

Yes, even though some of it doesn't reach the surface of Earth because of the atmosphere.

Infrared radiation from the Sun is the warmth you feel on your face when you stand

outside on a clear, sunny day. It's what warms the air before you breathe, it's what

melts the ice and snow in the Spring, and it's the source of the heat of the oceans.

Scientists in spent a lot of time looking for electromagnetic radiation at low frequencies - radio waves - after their theoretical prediction by James Clerk Maxwell in the 1860s. They were detected near lightning strikes and attempts were made to reproduce the effect artificially using electric sparks. Hertz in Germany and Popov in Russia were two of the early scientific investigators.

Guglielmo Marconi developed the science into a means for communicating without wires - wireless telegraphy - and conducted experiments that spanned greater and greater distances until in 1901 a message was sent over the Atlantic from Poldhu in Cornwall to Newfoundland.

To be perfectly technical, the answer to this question would have to be 'yes', but

only because light and radio are the same physical phenomenon.

The optical fiber only conducts the electromagnetic waves that we usually describe as "light".

The waves that we normally describe as "radio" cannot pass through optical fiber.

Guglielmo Marconi (Marchese Guglielmo Marconi), an Italian inventor, proved the feasibility of radio communication. He sent and received his first radio signal in Italy in 1895. By 1899, he flashed the first wireless signal across the English Channel, and two years later received the letter "S", telegraphed from England to Newfoundland. This was the first successful trans-Atlantic radiotelegraph. Wikipedia has a good article on this Nobel Prize winner, and a link is provided.

The only way to check for microwave leaks is to check it with an radiofrequency radiation (RFR) probe, which are very expensive and require technical training to operate.

Unless the microwave, and especially the door, have noticeable damage you can be very confident that exposure is very negligible and that no adverse health effects will come of it. As an added precaution, it is smart to stay several feet away from the microwave while it is cooking, since radiation levels drop sharply with increased distance.

You can buy a leakage detector for $40. Please note that these detectors are not certified by any government regulatory agency and therefore the manufacturer can make any claims they want - similar to the claims seen on "supplements" sold at the drug store.

To detect "the presence of distant metallic objects". (Taken from the Wikipedia page on Radar). You can read more about its beginning in the history section of it.

http://en.wikipedia.org/wiki/Radar#History

the answer is conduction

No all distances are measured in metres. Large distances in multiples of a metre, and small distances in fractions of a metre.

Radii of atoms fall between 30 and 300 picometres.

A picometre, pm, is 10−12 metres.

1. the thickness of the atmosphere attenuates gamma rays to safe levels at the surface
2. the thickness of the atmosphere attenuates x-rays to safe levels at the surface
3. ozone in the top layer of the stratosphere absorbs most ultraviolet
4. the atmosphere does not significantly absorb or attenuate visible light
5. water vapor in the atmosphere absorbs most infrared
6. water vapor in the atmosphere attenuates microwaves
7. the atmosphere does not significantly absorb or attenuate radio waves of longer wavelength than microwaves

No sure what you mean by "the reason." Electromagnetic waves exist in our Universe. Our eyes are able to detect a small fraction of the spectrum of these waves, and we call that small fraction of the spectrum, "light."

In other words, the reason that light is an EM wave is because it IS.

The type of electromagnetic radiation includes the wavelength of 10 up to the -7 m is visible light. The wavelike properties of electrons are useful in determining the velocity and position of a particle.

no wtawsgasjvdashfa sfdhfdsdaddf agnd dd d fsfg efe dghdfjfdgdfdd ddgfjfdf no wtawsgasjvdashfa sfdhfdsdaddf agnd dd d fsfg efe dghdfjfdgdfdd ddgfjfdf The velocity of light in vacuum (and in air for the most applications) is the same for all wavelengths of light. However in other media like glass the velocities vary. This is why a prism splits white light into its component colors

heat