what are various applications of electromagnetic waves? Please explain one of them in detail.?
362672
Radiowaves, look it up.\nAnd you definately got the category wrong.
159406
All the waves you have mentioned, are electomagnetic waves. They differ in their frequency, this means, their energy. Therefore, you cannot have a radio wave the same frequency as a visible wave, its one or the other, the frequency will indicate if its radio, infrared, visible and so on. The differnt frequencies gives them their particular properties. All of them travel at the same speed.
270577
A pulse of energy - electromagnetic radiation. So anything from radio waves to gamma rays counts as electromagnetic radiation. A pulse of this energy is usually associated with nuclear weapons due to the high intensity of radiation emitted by a thermonuclear reaction.
786117
All kinds of electromagnetic radiation reflect as light.\nSo do microwaves.\n\nTh
78010
Electromagnetic (EM) waves range from radio to gamma.\n\nThey are all EM waves.\n\nIt is more correct to say that radio is low frequency EM and light is mid frequency EM.
159721
Infra red - used for heating\n\nMicrowaves and radar - used for cooking and, erm, for radar. :) 802.11b/g LANs, bluetooth, portable telephones, baby monitors, satellite TV, satellite communications, and a host of other devices also operate in these frequencies\n\nTV and FM radio\n\nShortwave radio\n\nAM radio\n\nAircraft and Shipping radio bands \n\nExtremely low frequency -- very long wavelengths can be used to punch small amounts of information through to a receiver in extreme conditions.  The navy had an ELF system for the purpose of giving orders to launch nukes to submarines.  This system has reportedly been abandoned.\n\nSee "sources".  First source is an introductory web page to the electromagnetic spectrum from NASA.  Second source is information on the Navy's project ELF
383079
Basically they are energy waves that can travel through objects. They spread in the same manner as water waves but at a speed of 300,000 km/sec. They are used to communicate (voice, data, video) by making variations in the width and height of the waves. The receiver can interpret the variations and extract the information (audio, video, data).
722141
Microwave is any electromagnetic wave with "frequencies between 300 MHz (3 x 108 Hz) and 300 GHz (3 x 1011 Hz)."(1)\n\nThe most common impact could be seen in Microwave Ovens where food is heated up by causing the molecules in it to vibrate so fast, it heats up.\n\nIt is also used in radio broadcasting, radars & Wireless LAN protocols (e.g. Bluetooth). GSM mobile networks & cable TV use microwave.\n\nMicrowaves are used in maser, a device similar to laser, just that it operates at microwave frequencies.\n\nMore at: http://en.wikipedia.org/wiki/Microwaves
214606
well, microwaves are an electromagnetic wave, so pretty much any method of conducting, redirecting and conditioning microwaves is essentially magnetic in nature.\n\nthe person who suggested waveguides is on the right track; these are simply rectangular (or circular) tubes with dimensions that are of the wavelength of the waves you want to control.\n\nthe keyword you want to search on the web for is "microwave optics":\nhttp://www.google.ca/search?hl=en&q=microwave+optics&meta=\n\ncheers!
256568
1. The most common application of electromagnetism is something you see in every day life: Electric Motors. \nEvery electric motor (except some special purpose motots that have permanent magnets in them) use electromagnets called "poles" to produce north-south attraction forces to move the shaft.\n\n2. MagLev Trains: these trains use powerful magnets to levitate the train carriage to keep friction minimal. the magnets used are electromagnets\n\n3. Another useful application of electromagnetism is a CAT Scan machine. It is used in hospitals to scan and diagnose disease. Some parts of the body experience electrical currents. The stronger the current, the stronger the magnetic field. Advanced machines and scanning technology allow us :to pick up the magnetic fields; and identify where there is a higher frequency of electrical activity. \n\n4. electromagnetic Cranes are user to lift cars and metallic parts.\n\n5. umm cant think of nything else right now :)
715907
Electromagnetic waves don't need medium to travel.\n\nLike light, radio too, is an elctromagnetic wave, so it can travel through vacuum.
274869
Electromagnetic is a term that refers to electric and magnetic fields.  Since they are actually one and the same thing, they are collectively called electromagnetic.
102674
Electromagnetism is the what allows information contained in electric circuits to actually leave the circuits. Althought he technique by which the information (electric signal) actually leaves the circuit is quite complicated, suffice it to say, that using an antenna, this information can be allowed to travel through air.\nCo-incidentally, even light happens to be an electromagntetic wave. So, you can say that human beings owe their vision to electromagnetism.\n\nMircowaves - an electromagnetic phenomenon allow you to exhange information with satellites, besides of course, allowing you to cook food.\n\nThink about it! Radio, Mobile phone communication etc. all owes its existence to electromagnetism.\n\nThis is course is with respect to electromagnetic wave phenomeona. When you actually think about the fact that one can create artificial magnetics using electric current, the possibilities are limitless
369369
According to Maxwell's laws, one type of field can induce the other and vice versa. This makes electromagnetic waves possible.
659829
Have you heard about doppler effect.\nElectromagnetic signals are sent to the object(here its balls) and received back after reflection. Now the frequency of the received signal gets shifted (depending on the speed of the moving object)... from this shift we calculate the speed of the object.\nSame Phenomena is used to measure the speed of moving vehicles by TRAFFIC COPS.\nAnd its most interesting use is to measure the speed of distant stars.
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.
335077
Radio is the wireless transmission of signals, by modulation of electromagnetic waves with frequencies below those of light.\n\nRadio propagation is a term used to explain how radio waves behave when they are transmitted, or are propagated from one point on the Earth to another.\n\nIn free space, all electromagnetic waves (radio, X-rays, visual, etc) obey the inverse-square law which states that an electromagnetic wave's strength is proportional to 1/(x2), where x is the distance from the source. Doubling the distance from a transmitter means the strength is reduced to a quarter, and so on.\n\nRadio propagation on Earth is not only affected by the inverse-square model, but by a number of other factors determined by its path from point to point. This path can be a direct line of sight path or an over-the-horizon (see also radio horizon) path aided by reflection from the ionosphere. A variety of phenomena make radio propagation more complex.\n\nSince radio propagation is somewhat unpredictable, such services as emergency locator transmitters, in-flight communication with ocean-crossing aircraft, and some television broadcasting have been moved to satellite transmitters. A satellite link, though expensive, can offer highly predictable and stable coverage of a given area.\n\nA sudden ionospheric disturbance is often the result of large solar flares directed at earth. These solar flares can disrupt HF radio propagation\n\nThe Antenna\nThe beginning and end of a communication circuit is the antenna. The antenna will provide gain and directivity on both transmit and receive. The take off angle of the antenna is based on the type of antenna, the height of the antenna above ground, and the type of ground below and in front of the antenna. The take off angle will determine the angle of attack on the ionosphere, which will effect if and where the signal will be reflected by the ionosphere.\n\nGround wave Propagation\nGround waves are radio waves that follow the curvature of the earth. Ground waves progress along the surface of the earth and must be vertically polarized to prevent short circuiting the electric field through the conductivity of the ground. Since the ground is not a perfect electrical conductor, ground waves are attenuated as they follow the earth’s surface. At low frequencies, ground losses are low and become lower at lower frequencies. The VLF and LF frequencies are mostly used for military communications, especially with ships and submarines.\n\nEarly commercial and professional radio services relied exclusively on long wave, low frequencies and ground-wave propagation. To prevent interference with these services, amateur and experimental transmitters were restricted to the higher (HF) frequencies, felt to be useless since their ground-wave range was limited. Upon discovery of the other propagation modes possible at medium wave and short wave frequencies, the advantages of HF for commercial and military purposes became apparent. Amateur experimentation was then confined only to authorized frequencies in the range.\n\nLine-of-Sight Propagation\nGround plane reflection effects are an important factor in VHF line of sight propagation. The interference between the direct beam line-of-sight and the ground reflected beam often leads to an effective inverse-fourth-power law for ground-plane limited radiation.\n\nSkywave Propagation\nSkywave propagation is any of the modes that rely on reflection of radio waves from the ionosphere, which is made up of one or more ionized layers in the upper atmosphere. These layers are directly affected by the sun, and its varying activity (sunspot cycle) determines the utility of these modes. Forecasting of skywave modes is of considerable interest to amateur radio operators and commercial marine and aircraft communications, and also to shortwave broadcasters.\n\nTropospheric Scattering\nAt VHF and higher frequencies, the atmosphere at a height of around 6 miles (10 kilometres) can scatte