Elektromagnetic Waves invented by Heinrich Herzt. This episode explains this great invention and the way to the radio.
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Posts Tagged ‘Waves’
MUST SEE!!! HAARP Mind Control Radio Waves Series Jesse Ventura Part 1
Pretty amazed this was actually on tv!
Video Rating: 5 / 5
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How does the nature of radio waves allow a radio telescope to use a wire mesh surface?
Question by dy: How does the nature of radio waves allow a radio telescope to use a wire mesh surface?
How does the nature of radio waves allow a radio telescope to use a wire mesh surface? Would you expect millimeter wavelength telescopes to need smoother surfaces than typical radio dishes? Why or Why not?
Best answer:
Answer by David Knisely
The relatively long wavelength of radio waves means that the openings in wire mesh are quite small when compared to the size of the wave, so the mesh can be a fairly efficient reflector of radio energy despite the small holes. Millimeter wavelength telescopes would need a smoother and more continuous surface due to the shorter wavelength of the millimeter waves. This is needed to focus the waves without surface irregularities scattering them away from the focal point. To focus properly, the surface must be smooth to an accuracy of 1/8th of the wavelength of the radio photons being collected by the telescope.
What do you think? Answer below!
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In Washington DC, radio station WRC broadcasts on AM at 980 kHz. What is the wavelength of the radio waves us?
Question by Randall: In Washington DC, radio station WRC broadcasts on AM at 980 kHz. What is the wavelength of the radio waves us?
Best answer:
Answer by lee26loo
306.12244 meter
Know better? Leave your own answer in the comments!
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How can radio waves continue to travel for ever in outer space?
Question by Gerri R: How can radio waves continue to travel for ever in outer space?
How can radio waves continue to travel for ever in outer space?
On earth the radio waves from your favorite radio or TV station will only go 100 miles or so at the very most, but NASA and Astronomers say that they will travel almost for ever, or at least Billions and Trillions of miles with out stopping.
How is that possible?
Best answer:
Answer by mike1942f
Radio waves on earth are either line of sight (FM or TV) or broadcast. The former can only be picked up when the earth has not curved out of their path. The latter in spreading soon become weak enough that the other signals being generated overwhelm them.
All of these signals, in theory, can go on forever in space, but in practice become so weak that they can not be detected. An indication of how far they can go is the very low wattage of the transmitters on the Mars orbiters and landers, which are sent and received with dish antennas with digital correction for lost bits. Harder to find is the wattage of the distant transmissions from the satellites that went beyond Neptune, which had to be received with very large dish antennas.
What do you think? Answer below!
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Radio Waves: Making Telephones Free Of Charging
Radio Waves: Making Telephones Free Of Charging
You may probably never believe that a telephone which does not need a power supply forever. This is true that the engineers in Nokia research center in England claimed that they have developed a kind of telephone that does not need power supply. This new technology can collect the radio waves around to use as a power supply to support a cellphone to work.
Radio waves are a type of electromagnetic radiation which pass through the freespace including the air and the vacuum. It is one of the limited frequency band of the freespace. The upper limiting frequency of radio waves is 300GHz while the lower limiting frequency differs.
There are many applications of radio waves with the earliest application in the navigation use. It was using the Morse telegraph to pass on a message between the ship and the lands. Today, there are many types of radio waves applications, including wireless data nets, different mobile communications and radio wave broadcast.
The radar is the modern device that uses the radio wave technology. A radar can detect the distance by measuring the delay reflected by the wave. Now radars can be classified to many kinds which include the navigation radar, search radars and weather radars.
Apart from the Nokia, researchers in the University of Washington D.C. have also been in the projection. They have developed a kind of sensor for temperature and humidity, and the sensor can collect the radio power 4.1 kilometers away from the television antenna which is 1 mega Watt, however the power is very weak. In the near future, the technology must be developed and be put into use by common people. Related IC for the telephone is: NJU6375.
xxz100 is the freelance writer for e-commerce website in the IC. seekic.com offers the IC buyers around the world to find quality supplier of ICs globally. We try best to aggregate all the trade leads in the IC business world, and let these leads benefit all business person.
Article from articlesbase.com
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Q&A: How can crystal radios work if the energy provided by radio waves isnt enough to overcome forward voltage drop?
Question by Maria: How can crystal radios work if the energy provided by radio waves isnt enough to overcome forward voltage drop?
If the energy provided from the radio waves in a crystal radio isnt enough to overcome the forward voltage drop of the diode being used, then how can a crystal radio even work?
Energy picked up by crystal radios is in the microwatt and nanowatt range, so how can the crystal radio work if the diode it used needs at least 0.3 volts to work? (Overcome forward voltage drop)
Best answer:
Answer by Mark G
You use a very long antenna (+100 ft) to collect enough radio energy to allow operation.
And close proximity to the radio transmitter
Give your answer to this question below!
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Radio Advertising-ride the Radio Waves to Instant Income (part 1)
Radio advertising as a direct marketing tool? If that sounds far-fetched, then like most direct marketing pros, you too may have been blinkered into believing that ‘direct marketing’ is limited to DRTV, catalogs, mail and other ‘traditional’ marketing methods. Radio may seem to some people to be the most unlikely bet for direct marketing.
We all have heard that radio just can’t compete with the other direct marketing methods. Take for instance DRTV. The radio simply can’t duplicate TV’s ability to give a product demonstration to your target audience in the comfort of their home. It cannot even compete with the print media in terms of their reach as direct marketing vehicles.
Yet, statistics show that prospects who call in from a direct response ad on radio show higher conversion ratios than other media. How is that possible? After all, we are almost always doing something else when we listen to the radio. Think of it this way-most people don’t watch television 24/7. And we probably throw the direct mailers into the dustbin. But many people listen to the radio for a large part of their day. They may listen passively as they chat or work or eat, but the fact remains that they will tune in to their favorite station and let it play. So, when a listener takes the trouble to respond to a radio advert, it is because they are genuinely interested in your product.
As a result, radio prospects prove to be good leads that will likely get converted into a sale. And that can create a seemingly inexhaustible source of good prospects that a sales team can follow up on.
The radio also can’t seem to compete with direct mail in terms of making a direct sale. But when you use an integrated approach as part of your overall strategy, radio advertising proves to be a great lead generator because of the bond it forges with its listeners.
So, if you want to maximize the lead-generating ability of the radio to augment your direct marketing campaign, here are some helpful tips to help you increase response:
1) Consider a 60-second spot instead of a 30-second one, which is not really enough time to make your appeal.
2) Make sure to give out your telephone number and/or website during the advert. Then repeat it several times to insure retention.
3) Repeat your product or income plan name at least four times during those 60 seconds. Don’t forget, you don’t have the luxury of making the prospect ‘read’ your name or ‘see’ your logo.
4) Communicate with the audience in a conversational tone.
Another great way to exploit the radio and improve your chances of being ‘heard’ is to sponsor primetime programs, so that the listeners can hear their favorite DJs speak your message and name, and they’ll probably remember it better.
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What is the difference between radio waves and TV waves?
Does the FM radio works similar to a TV? I mean the way it transmits signals. Do they have the same signals that they receive?
I am just a bit curious here. My Nokia 5310 XM has FM radio. I am just wondering If I can turn my cellphone into a TV by downloading some kind of java application that receives signals just like the built in FM radio.
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How does a radio filter out waves of different frequencies?
How does a radio filter out waves of different frequencies?
With all the different frequencies of waves in the air, how does the sound out of a radio come out clear?What do I need to make one?
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