There are no such things as 'AM' and 'FM' waves.
When we take an electromagnetic wave, and force it to carry information by changing
its amplitude according to some pattern related to the information, we operate on it
with the process of 'AM'. Commercial radio stations that add sound information to
their carrier waves in that way operate in the frequency band of 0.55 - 1.7 MHz
(in the US).
When we take an electromagnetic wave, and force it to carry information by changing
its frequency according to some pattern related to the information, we operate on it
with the process of 'FM'. Commercial radio stations that add sound and other
information to their carrier waves in that way operate in the frequency band of
88 - 108 MHz (in the US).
For a long time, scientists thought that gravity might be an extremely long waved form of electromagnetic energy. Since then, scientists found that all forms of electromagnetic energy travel in little bundles called photons and they have established that these photons have mass and they have also established that gravity has no mass so it is not a form of electromagnetic energy.
http://images.Google.com/images?hl=en&q=electromagnetic+spectrum&um=1&ie=UTF-8&ei=S4TASbalIYr2sAPz4oSbBA&sa=X&oi=image_result_group&resnum=4&ct=title
FM radio uses frequency modulation to broadcast sound over radio. FM radio waves are usually transmitted between 87.5 to 108.0 megahertz.
Examples of electromagnetic radiation include: Ultra-violet radiation red light Infra-red radiation blue light radar waves X-rays Television signals GPS signals green light cell-phone signals Microwaves AM radio waves Gamma rays 3G and 4G data links FM radio waves
AM waves are reflected by earth's ionosphere
AM and FM are modulation types, that can probably be used for different kind of waves; but they are usually applied to radio waves. Radio waves are a kind of electromagnetic waves.
FM waves are of higher frequency than am waves.AM radio ranges from 535 to 1705 kilohertzFM radio ranges in a higher spectrum from 88 to 108 megahertz.
No. -- A fruitcake is a mixture of solids. It is not an electromagnetic wave. -- A martini is a mixture of liquids. It is not an electromagnetic wave. -- Air is a mixture of gases. It is not an electromagnetic wave. -- White light is a mixture of electromagnetic waves. -- An FM radio signal is a mixture of electromagnetic waves.
Spectrum FM was created in 1996.
For a long time, scientists thought that gravity might be an extremely long waved form of electromagnetic energy. Since then, scientists found that all forms of electromagnetic energy travel in little bundles called photons and they have established that these photons have mass and they have also established that gravity has no mass so it is not a form of electromagnetic energy.
They go by many names in everyday life. Here are a few of them: -- AM -- FM -- TV -- GPS -- cellphone signal -- wireless -- microwave -- heat -- red light -- green light -- blue light -- tanning rays -- X-rays
Both are radio waves, meaning that they are electromagnetic radiation (light) with a wavelength longer than a metre. AM waves have a frequency of 520,000 Hz to 1,620,000 Hz (wavelengths of 580 metres to 185 metres) while FM waves have a frequency of 87,500,000 Hz to 108,000,000 Hz (3.4 metres to 2.8 metres). The signal is encoded onto AM waves by varying the amplitude (intensity) and onto FM waves by varying the frequency.
Waves FM was created in 1990.
Radio communication works by converting sound waves into electromagnetic waves. These electromagnetic waves are then encoded in the radio frequency range of the FM or AM station your are listening to.
what is the total amount of spectrum used by the FM stations in Chennai?
the microwave is a wavelength of light beyond the human visible spectrum. the full spectrum of light as known by current science from smallest wavelength to longest is; y rays, x rays, UV (ultraviolet), the visible spectrum, infra red, micro waves, radio waves (including FM and AM frequencies), and long radio waves so a microwave is a wavelength of light longer then infra red, and shorter then radio waves.
First of all, your question is not worded all that well. When we speak of a wave, in this case an electromagnetic one (as opposed to one made of water perhaps), we tend to describe them quantitatively with certain numbers. One may speak of the frequency of the wave (measured in Hertz), the energy of a wave (in joules), or, in your case, the wavelength of a wave (in metres). The electromagnetic spectrum is usually taught to span from radio waves (waves with relatively large wavelengths and low frequencies) to gamma rays (waves with relatively small wavelenths and very high frequencies). The misunderstanding you seem to have is that the electromagnetic spectrum stops at radio waves. It does not. In theory, the electromagnetic spectrum is infinite and continuous. That is to say, there is no limit to how large a wavelength can be nor how small one can be. The electromagnetic spectrum susually stops at radio waves (with a typical wavelength ranging from 1 to 10 metres) because waves longer than these lose their practicality. In theory, they exist, but they simply are not as important to us than their shorter cousins!!! Just as a side note, "long waves" are said to have a wavelength of around order 10^3 metres (or just around the order of a kilometre). Theoretically, I can imagine it possible to have a wave with a wavelength as long as the universe itself! Of course, as I mentioned earlier, such waves are of little practical value to us. As a result, yes it does have the "longest" waves.