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Radio

A radio refers to an electronic device that works by receiving radio wave (an electromagnetic wave) that has the capacity to broadcast news, speech, music and other audio through the air.

8,296 Questions

How does the anti-war sentiment that existed during the Vietnam era compared to role of television and radio in the war in Iraq?

The country of NORTH VIETNAM was being bombed by B-52's and other strike aircraft such as F-105 Thunderschiefs, F-4 Phantoms, A-4 Skyhawks, etc. President Nixon, and President Johnson, before him, were trying to bring Hanoi (the capitol of N. Vietnam) to the peace treaty table. Air campaigns such as "Rolling Thunder", "Linebacker I", "Linebacker II", and the B-52 missions called "Arc Light" missions were aimed at bringing North Vietnam to their knees. Aircraft casualties were very high. Nearly 2,000 fixed wing (not counting helicopters which are classified as "rotary wing" aircraft) were lost in the war. Airmen became the largest part of the Prisoner of War (POW) group, as well as our MISSING IN ACTION group of men. So in regards to "television and radio" broadcasts contributing to anti-war sentiment during the Vietnam War, a common "protest" was "END THE BOMBING", and/or "STOP THE BOMBING OF NORTH VIETNAM", "BRING BACK OUR MISSING MEN", "FREE THE POW'S",etc. Since the U.S. and it's coalition is NOT attacking the country of Iraq, there are No such losses of men and aircraft, and no such damage to the country of Iraq. Instead the U.S. and it's coalition is attempting to "...restore international peace and order" by taking military action against insurgents. The Vietnam War, like the previous wars of the 20th century, was fought against the North Vietnamese ARMY, AIR FORCE, and it's NAVY. The country of NORTH VIETNAM was being bombed by B-52's and other strike aircraft such as F-105 Thunderschiefs, F-4 Phantoms, A-4 Skyhawks, etc. President Nixon, and President Johnson, before him, were trying to bring Hanoi (the capitol of N. Vietnam) to the peace treaty table. Air campaigns such as "Rolling Thunder", "Linebacker I", "Linebacker II", and the B-52 missions called "Arc Light" missions were aimed at bringing North Vietnam to their knees. Aircraft casualties were very high. Nearly 2,000 fixed wing (not counting helicopters which are classified as "rotary wing" aircraft) were lost in the war. Airmen became the largest part of the Prisoner of War (POW) group, as well as our MISSING IN ACTION group of men. So in regards to "television and radio" broadcasts contributing to anti-war sentiment during the Vietnam War, a common "protest" was "END THE BOMBING", and/or "STOP THE BOMBING OF NORTH VIETNAM", "BRING BACK OUR MISSING MEN", "FREE THE POW'S",etc. Since the U.S. and it's coalition is NOT attacking the country of Iraq, there are No such losses of men and aircraft, and no such damage to the country of Iraq. Instead the U.S. and it's coalition is attempting to "...restore international peace and order" by taking military action against insurgents. The Vietnam War, like the previous wars of the 20th century, was fought against the North Vietnamese ARMY, AIR FORCE, and it's NAVY. The country of NORTH VIETNAM was being bombed by B-52's and other strike aircraft such as F-105 Thunderschiefs, F-4 Phantoms, A-4 Skyhawks, etc. President Nixon, and President Johnson, before him, were trying to bring Hanoi (the capitol of N. Vietnam) to the peace treaty table. Air campaigns such as "Rolling Thunder", "Linebacker I", "Linebacker II", and the B-52 missions called "Arc Light" missions were aimed at bringing North Vietnam to their knees. Aircraft casualties were very high. Nearly 2,000 fixed wing (not counting helicopters which are classified as "rotary wing" aircraft) were lost in the war. Airmen became the largest part of the Prisoner of War (POW) group, as well as our MISSING IN ACTION group of men. So in regards to "television and radio" broadcasts contributing to anti-war sentiment during the Vietnam War, a common "protest" was "END THE BOMBING", and/or "STOP THE BOMBING OF NORTH VIETNAM", "BRING BACK OUR MISSING MEN", "FREE THE POW'S",etc. Since the U.S. and it's coalition is NOT attacking the country of Iraq, there are No such losses of men and aircraft, and no such damage to the country of Iraq. Instead the U.S. and it's coalition is attempting to "...restore international peace and order" by taking military action against insurgents. The Vietnam War, like the previous wars of the 20th century, was fought against the North Vietnamese ARMY, AIR FORCE, and it's NAVY.

Which President was the first to speak live on radio?

  • Woodrow Wilson in 1919 spoke via ship radio to the crews of other ships. Some people on shore reportedly were able to pick up the transmission.
  • Warren Harding on June 14,1922 had his remarks broadcast over public radio. He was speaking at a dedication ceremony in honor of Francis Scott Key.
  • Calvin Coolidge on December 5,1923 was the first to have a presidential speech broadcast widely ( i.e. to about 5 million listeners)

Who was the first us president to have his inaugurated broad cast on the radio?

In 1925, Calvin Coolidge's Inaugural address was the first to be broadcast nationally by radio. (This info was obtained from FOX News, so it is most likely a blatant lie)

What is the location of the worlds first commercial radio station KDKA which began broadcasting in 1920?

Although KDKA in Pittsburgh has long claimed to be first, that is a myth. Certainly, KDKA was an influential and important early station, and its broadcast of the returns from the presidential election (Harding vs. Cox) on November 2, 1920 is a seminal moment in early radio history. But KDKA was neither the first station on the air, contrary to their parent company (Westinghouse) and its excellent publicity department; nor was it the first station with a commercial license.

8MK (today WWJ) in Detroit was on the air in late August 1920, a fact documented from newspaper reports. It too broadcast the presidential returns, but unfortunately, it did not have a huge publicity department. Still, based on facts and evidence, 8MK was the first station to do what we associate with modern radio-- broadcast music, news, and educational talks to a wide-ranging audience. But there were others doing that too. In greater Boston, 1XE (later WGI) was also on the air at that time. So were stations in Madison, Wisconsin and several other cities; there is also evidence that XWA in Montreal was on the air at that time as well. Further, KDKA did not have a commercial license-- nobody did. Such a license was not created until September 1921, and another Westinghouse station, WBZ (today in Boston, but then in Springfield MA) received that first license. So, while KDKA is indeed a major factor in early radio, it is incorrect to say it was the first commercial station.

How the radio is an impact in peoples lives?

It helps people know how the weather is like or instead of watching a game you can listen or in tornado it will tell you when it starting or when it has ended!

When was radio patented?

On June 21, 1943 the Supreme Court of the United States held the broad claims of Guglielmo Marconi's patent for improvements in apparatus for wireless telegraphy to be invalid. The books don't mention that the powerful spark transmitters used by Marconi were Tesla coils, nor do they point out that Marconi's central radio patents were later struck down because of Tesla's prior art. The Physics was awarded to Marconi for radio in 1909. It was a mistake. As early as 1892, Nikola Tesla created a basic design for radio.

How can you find what radio stations are playing Alice's Restaurant in NYC on thanksgiving?

I had the same question! So far, I've found that this one does: WFUV 90.7 FM, Public Radio from Fordham University in New York City. Also, if you subscribe to Sirius, I understand that it's there as well. Enjoy!

How does a radio transmitter produce radio waves?

There are two primary types of electrical amplification available for any application.

The first type, transistor amplification, is what you are most likely familiar with. This is the common form of amplification used today in most consumer products like radios and car amplifiers. However, before the invention of the transistor, vacuum tubes did the same job. Tubes are electrical switches mounted inside of glass enclosures that are under vacuo. They resemble light bulbs. In radio transmission, however, these vacuum tubes are commonly the size of a household clothes dryer. These tubes amplify the frequency before the voltage is sent up the radio station's transmission tower. At the top of the tower, a broadcast antenna is mounted. These antennae are special shapes and lengths that correspond to both the frequency and direction of the intended transmission.

Can you have a radio signal underground?

Yes, you can however the distance that a signal may be travel depends on the power and frequency of the signal. For signals at the same power a lower frequency signal will travel further.

Can you use a cb radio antenna for am-FM radio?

Sure, you can use it; but it might not do a very good job.

If you're listening to AM, you're receiving between 0.5-1.6 MHz, whereas FM is coming to you at 88-108 MHz.

The CB antenna is designed to be resonant at 27 MHz.

Why does every radio station have a different carrier frequency?

That's not exactly true. Any frequency you choose has several radio stations on it,

but just not in the same city.

Frequency is what your radio uses to separate the individual stations. If two stations

in the same city transmitted on the same frequency, your radio couldn't separate them.

When you tuned to that frequency, you'd hear both of them at the same time, and you

couldn't understand either one.

Listen to the 27 MHz 'Citizen's Band' some time.

Why do you modulate High frequency waves?

In order to cause the waves to carry information from one place to another.

AND THE SIZE OF ATNENNA PROPORTIONED WITH THE LENGTHT OF WAVES

IN ORDER TO DECREASE THE SIZE OF ATNENNA WE MUST FIRE HIGH FREQUENCY CAUSE

HIGHER THE FREQUENCY IS ,AND SHORTER THE WAVE IS

Reflector disk that collects radio waves?

A parabolic dish or reflector serves to focus and collect radio waves in one specific point or direction. The dish design helps to amplify and enhance the signals received by reflecting them towards a central point, where they can be captured by an antenna or receiver for processing and amplification. This technology is commonly used in satellite dishes, radio telescopes, and communication systems.

What is the frequencies in the range of RF waves used by commercial radio broadcasting stations?

Each country has different frequency bands allocated for AM and FM radio. In the U.S. AM takes up the range from 535KHz to 1605KHz. FM radio takes 88.0MHz to 108.0MHz.

Each radio station then receives a slice of that frequency band, regulated by the FCC. Each station is typically given a frequency far from all other stations. For example, three stations would be given the frequencies 93.3MHz, 94.5MHz and 96.1MHz. In theory, the stations could be closer (ie 94.3MHz, 94.5MHz and 94.7MHz) though this is rarely done because each station would then cause more interference to its neighbors.

(The stations don't actually 'cause interference' to their neighbors. The weakness

is the ability of consumer-grade receivers to separate stations whose frequencies

are close together.)

Are radio waves a form of sound or light?

When you listen to the radio, you are hearing sound, which has no resemblance

to light, radio waves, or x-rays. However, the sounds you hear are created in

the radio receiver, using information that was carried to your location by means

of radio waves.

Radio signals are broadcast by what waves?

Radio waves are electromagnetic waves. Electromagnetic waves include waves such as X rays, ultraviolet light, visible light, infrared rays and so on, but you probably imagine radio waves to be quite different from these waves. Of the various kinds of electromagnetic waves, radio waves have a longer wave length than infrared rays, and are defined by the Radio Law as 'electromagnetic waves with a frequency of less than 3,000 GHz (3 THz)'

Ultralow frequency radio waves

below 3kHz

radio waves

3kHz~
3THz infrared rays

3THz~
380THz visible light

380THz~
790THz ultraviolet light

790THz~
105THz X rays

105THz~
107THz γ rays


above 107THz

Names of radio waves Frequency Wave length Principal applications VLF(Very Low Frequency) 3kHz ~ 30kHz 100km ~ 10km LF(Low Frequency) 30kHz ~ 300kHz 10km ~ 1km Vessel / Airplane beacon MF(Medium Frequency) 300kHz ~ 3MHz 1km ~ 100m AM radio, Marine radio, Amateur radio HF(High Frequency) 3MHz ~ 30MHz 100m ~ 10m Shortwave broadcasting, Marine / Air radio, Amateur radio VHF(Very High Frequency) 30MHz ~ 300MHz 10m ~ 1m TV, FM, Fire radio, Police radio, Disaster PA radio network UHF(Ultra High Frequency) 300MHz ~ 3GHz 1m ~ 10cm Low power radio, Mobile-phone, Taxi radio, Amateur radio, TV, Wireless LAN SHF(Super High Frequency) 3GHz ~ 30GHz 10cm ~ 1cm Satellite broadcasting, Radar EHF(Extremely High Frequency) 30GHz ~ 300GHz 1cm ~ 1mm Satellite broadcasting, Radio astronomy, Radar submillimeter waves 300GHz ~ 3THz 1mm ~ 0.1mm

What is the modulation of frequency?

It is a device or electronic circuit that changes the frequency of an oscillator according to the amplitude of modulating signal. For instance, if the modulation is linear, the modulator changes the frequency proportional to the amplitude of the modulating voltage.

How do televisions use radio waves?

In the sense that TVs must radiate photons in at least the visible light spectrum for you to even see what's on the screen, yes, they're radioactive. However, very, very little of this radiation is ionizing radiation (x-rays, gamma rays, beta rays, etc.), and thus is completely harmless to you. The dust collected on the TV's screen because of its static electrical field does have slight amounts of ionizing radiation though, because some of that dust is the naturally produced, radioactive isotope, 222Rn, that's always floating around in the background. Also, if your TV is very old, its X-ray shielding could be compromised, and thus could give you a very small, pretty-much harmless dose of X-ray radiation if you were sitting less than two inches from the screen.

How did FM radio change the landscape of radio?

It became so popular because during the 1920s and so on, and during the Great Depression and World War 1 and such, it was usefull for a new standard in communication with your friends or communication in war but it was also sparked in regular citizens in the U.s and manyother places for leisure. Cause in that time, the radio didnt only broadcast news and music, but dramas, sitcoms, and music programs.