I need to know what is the electromagnetic wave?
116765
here you go:\n\nhttp://images.google.com/images?svnum=10&hl=en&q=electromagnetic+spectrum&spell=1\n\nit contains all frequencies
388909
Photons are EM waves. They have the same speed.
103941
Some properties of the electromagnetic spectrum is that all waves in this spectrum travel at the speed of light.  The spectrum varies by wavelength and also energy, from gamma rays -> xrays ->ultraviolet ->visible light -> infared ->microwave ->radio.  with gamma having the highest energy with the smallest wavelength and radio having the lowest energy with the largest wavelength.  \n\nHope this helps
685820
X-rays are just a portion of the electromagnetic radiation spectrum. Light is also part of it, as well as microwaves, radio waves, UV rays & gamma rays. Their wavelength is .1-10 nm
689872
Everything in the known Universe is energy, the mysterious power that holds atoms together, makes trees grow, keeps your heart beating and the Earth spinning through space. This energy vibrates at different speeds, or wavelengths. Matter may be understood to be very slow-moving energy relative to, say, sunlight. We can use the electromagnetic spectrum, a chart of all the types of energy science has measured, to better understand this concept. X-rays, radio waves, microwaves, and television transmissions are all to be found on the electromagnetic spectrum, as well as visible light, within which we find the seven colors of the rainbow: red, orange, yellow, green, blue, indigo and violet. All of these energy forms have characteristic frequencies at which they vibrate.\n\nIf you tune your radio to a frequency of, say, 102.5, you'll always get the same station. The station sends out its programming at a particular frequency; your receiver transforms the radio waves into audible sound waves. One form of energy is transmuted into another form.\n\nColorology, the science of color, is based on the same principle. Each of the seven colors and their shadings vibrate at a characteristic frequency; anything you can see (visible light) must also be vibrating at one or more of those frequencies. Our physical bodies "tune in to" -- or receive and resonate with in a particular way -- each of the seven colors of the rainbow. Sunlight contains all of those frequencies and more (ultraviolet rays, cosmic rays, etc.)\n\nHow do our bodies "tune in" to these frequencies? We all have seven major endocrine glands in our bodies, which regulate the functioning of bodily systems (circulation, reproduction, respiration and so forth) by secreting complex chemicals called hormones. Hormones act to stimulate or depress bodily activities as necessary to maintain a state of dynamic balance that we experience as "good health." As a result of excessive or insufficient amounts of hormones, physical, mental and/or emotional imbalance (dis-ease) can occur.\n\nEach of these seven endocrine glands, being a visible energy form, is vibrating at the frequency of one of the colors of the rainbow. We can, therefore, by various methods expose our bodies to these colors and literally, physically affect the vibratory rate of the endocrine glands, which in turn affects the rate of hormone secretion, and thus the functioning of the organs. This holds true for the brain as well; therefore, emotional and mental states are also influenced.\n\nChildren, the elderly, anyone in poor health, and current or recovering substance abusers (all of whom may be in a state of energy imbalance) are usually overly sensitive to the effects of color; its use should, therefore, be carefully monitored with these groups.\n\nUsing Color Practically\nIt's usually best to start by balancing the body using all the colors; then, once you know what system (color) is out of balance, you can work more extensively on that particular area, either stimulating the energy with that system's color, or by suppressing the energy with the complementary color. When balancing the body, always start at the base of the spine (red, the "root" chakra or energy center) and work your way up the torso to the top of the head (violet, the "crown" chakra). The body more easily adjusts and accepts the energy if the frequencies progress from longer to shorter wavelengths ("slower to faster").\n\nThere are a number of simple, inexpensive and effective ways to intentionally employ color:\n\nVisualization -- Simply imagine a ray of light of the desired color penetrating and bathing the dis-eased area. Researchers have found that thoughts have a tangible effect on the physical body, measurable by EEG machines and other methods.\n\nSolarized water -- Place a clear, glass bottle filled with distilled or purified water and covered with colored cellophane in direct m
868251
Radio waves are a form of electromagnetic radiation, created whenever a charged object (in normal radio transmission, an electron) accelerates with a frequency that lies in the radio frequency (RF) portion of the electromagnetic spectrum. In radio, this acceleration is caused by an alternating current in an antenna. Radio frequencies occupy the range from a few tens of hertz to three hundred gigahertz, although commercially important uses of radio use only a small part of this spectrum.[1]\n\nElectromagnetic radio spectrum \n\nOther types of electromagnetic radiation, with frequencies above the RF range, are microwave, infrared, visible light, ultraviolet, X-rays and gamma rays. Since the energy of an individual photon of radio frequency is too low to remove an electron from an atom, radio waves are classified as non-ionizing radiation.\n\nMobile phones and the network they operate under vary significantly from provider to provider, and even from nation to nation. However, all of them communicate through electromagnetic radio waves with a cell site base station
367341
Light is the only thing we see with our eyes. Electromagnetic waves are light wave, of which we see a very small branch of frequency.
856950
IR ray is an electromagnetic wave, like visible light, X-ray, gamma ray and UV ray(even radio waves). the energy of IR wave is lower than visible, UV, X-ray and gamma. when one of the high energy electromagnetic waves hit a molecular, they will brake it to smaller parts( if they have enough energy) but IR doesn't have enough energy, so all it can do is to make the molecules move faster. the movement average of molecules is what we call heat, so when IR hits a material, it'll rise the average molecular movement in it and we say that the material became hotter.
126863
The RF waves emanating from an antenna are generated by the movement of electrical charges in the antenna. Electromagnetic waves can be characterized by a wavelength and a frequency. The wavelength is the distance covered by one complete cycle of the electromagnetic wave, while the frequency is the number of electromagnetic waves passing a given point in one second. The frequency of an RF signal is usually expressed in terms of a unit called the "hertz" (abbreviated "Hz"). One Hz equals one cycle per second. One megahertz ("MHz") equals one million cycles per second.
237286
Electromagnetic waves are light, radio, UV, infra-red, gamma, micorwaves and go at the speed of light 186,000 miles per second (although they go a bit slower in matter). The waves themselves consist of vibrating electric and magnetic fields. Probably you know a few uses for these. For example, our eyes pick up EM waves and that allows us to *see*.\n\nSound waves are pressure waves in some material. Their speed depends on the material. Sounds goes through air at about 700 miles per hour. This is considerable slower than light.\nThese are the waves that our ears hear.\n\nWater waves are what you see on the surface of water when you throw a stone into the water. These go a *lot* slower even than sound waves.
371626
this ones pretty simple:\nhttp://www.nasa.gov/centers/langley/images/content/114284main_EM_Spectrum500.jpg\nor pick one from here:\nhttp://images.google.com.au/images?q=electromagnetic+spectrum&hl=en&btnG=Search+Images
328045
Yes, a radio wave is an elecromagnetic wave just as light, X-rays, microwave, gamma rays, etc.  All carried by photons.  Radio waves are the least energetic, or longest wavelength, of the electromagnetic spectrum.  Sound waves, on the other hand, are like waves in water, or sand dunes-they are movements of atoms-air, in the case of sound-they are not carried by photons, do not go the speed of light, and are not electromagnetic.  All electromagneic waves go the speed of light, since they are carried by photons.  The only difference between a radio wave and a visible light wave in the frequency of the wave and the energy of the photon (both of which are integrated).
926730
maxwell eqn \nther is no need to rember  it 's of no use\n till you pass out of school\nbandwidth it's the range of length within \nwhich any elctromagnetic wave may fall or lie in like the bandwidth for visible light 400 nanometers to 700 nanometers
565906
Electromagnetic radiation travels (propagates) by means of oscillating electromagnetic fields that pass through the air and the vacuum of space equally well, and does not require a medium of transport (such as the aether). When radio waves pass an electrical conductor, the oscillating electric or magnetic field (depending on the shape of the conductor) induces an alternating current and voltage in the conductor. This can be transformed into audio or other signals that carry information. The word 'radio' is used to describe this phenomenon, and television, radio, radar, and cell phone transmissions are all classed as radio frequency emissions.
7228
Ther are two natures assigned to light\n1.It is made of particles called photons\n2.It is an electromagnetic wave.
253932
Electromagnetic radiation is a propagating wave in space with electric and magnetic components. These components oscillate at right angles to each other and to the direction of propagation.\n\nThe term electromagnetic radiation is also used as a synonym for electromagnetic waves in general, even if they are not radiating or travelling in free space. This sense includes, for example, light travelling through an optical fiber, or electrical energy travelling within a coaxial cable.\n\nElectromagnetic (EM) radiation carries energy and momentum which may be imparted when it interacts with matter.
697343
Electromagnetic radiation is generally described as a self-propagating wave in space with electric and magnetic components. They are forms of radiation on the elctromagnet ic spectrum!! These components oscillate at right angles to each other and to the direction of propagation, and are in phase with each other. Electromagnetic radiation is classified into types according to the frequency of the wave: these types include, in order of increasing frequency, radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays and gamma rays. In some technical contexts the entire range is referred to as just 'light'. [1]\n\nEM radiation carries energy and momentum, which may be imparted when it interacts with matter.\n\nElectromagnetic waves of much lower frequency than visible light were first predicted by Maxwell's equations and subsequently discovered by Heinrich Hertz. Maxwell derived a wave form of the electric and magnetic equations, revealing the wavelike nature of electric and magnetic fields and their symmetry. йō ŞрзĈ\n\nAccording to these equations, a time-varying electric field generates a magnetic field and vice versa. Therefore, as an oscillating electric field generates an oscillating magnetic field, the magnetic field in turn generates an oscillating electric field, and so on. These oscillating fields together form an electromagnetic wave.