Examples of FM radio waves in the following topics:
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- Radio waves have many uses—the category is divided into many subcategories, including microwaves and electromagnetic waves used for AM and FM radio, cellular telephones and TV.
- FM radio waves are also used for commercial radio transmission, but in the frequency range of 88 to 108 MHz .
- Since audible frequencies range up to 20 kHz (or 0.020 MHz) at most, the frequency of the FM radio wave can vary from the carrier by as much as 0.020 MHz.
- FM radio is inherently less subject to noise from stray radio sources than AM radio because amplitudes of waves add noise.
- Frequency modulation for FM radio.
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- Electromagnetic waves are the combination of electric and magnetic field waves produced by moving charges.
- Electromagnetic waves are ubiquitous in nature (i.e., light) and used in modern technology—AM and FM radio, cordless and cellular phones, garage door openers, wireless networks, radar, microwave ovens, etc.
- Placing a coin in contact with both terminals of a 9-volt battery produces electromagnetic waves that can be detected by bringing the antenna of a radio (tuned to a static-producing station) within a few inches of the point of contact.
- Electromagnetic waves are a self-propagating transverse wave of oscillating electric and magnetic fields.
- Notice that the electric and magnetic field waves are in phase.
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- An antenna is a device that converts electric power into radio waves, and vice versa.
- As a consequence, visible light and radio waves should share common characteristics.
- An antenna (or aerial) is an electrical device that converts electric power into radio waves, and vice versa.
- In transmission, a radio transmitter supplies an oscillating radio frequency electric current to the antenna's terminals, and the antenna radiates the energy from the current as electromagnetic waves (radio waves).
- These serve to direct the radio waves into a beam or other desired radiation pattern.
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- Radio station newscasts can range from as little as a minute to as much as the station's entire schedule, such as the case of all-news radio, or talk radio.
- All-news radio is a radio format devoted entirely to discussion and broadcast of news.
- By 1991, Limbaugh had become the number one most syndicated radio host and AM radio had been revived.
- The September 11, 2001 attacks brought on a wave of nationalism and a desire to rally around the United States and its government, which was led at the time by the Republican Party.
- Explain the role of radio news in media coverage and recent trends in radio news
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- frequency allocation: The division of the spectrum into unlicensed frequency bands, such as ISM band and U-NII band, and licensed frequency bands, along with television channel frequencies, FM broadcast band, and amateur radio frequency.
- The Radio Act of 1927 was the first major broadcasting law in the country.
- The Communications Act of 1934 amended the Radio Act, and the equal time provision is located in Section 315 of the Communications Act.
- The FCC's intent was to "regulat[e] interstate and foreign commerce in communication by wire and radio so as to make available, so far as possible, to all the people of the United States, without discrimination on the basis of race, color, religion, national origin, or sex, a rapid, efficient, Nation wide, and world wide wire and radio communications service . . . ".
- (In this context, the word "radio" covers both broadcast radio and television).
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- Interference and diffraction are terms that describe a wave interacting with something that changes its amplitude, such as another wave.
- In physics, interference is a phenomenon in which two waves superimpose to form a resultant wave of greater or lower amplitude.
- Interference effects can be observed with all types of waves, including light, radio, acoustic, and surface water waves.
- When the two waves overlap, the net displacement at a particular point is the sum of the displacements of the individual waves.
- Diffraction occurs with all waves, including sound waves, water waves, and electromagnetic waves such as visible light, X-rays, and radio waves.
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- Diffraction refers to various phenomena such as the bending of waves around obstacles and the spreading out of waves past small openings.
- Diffraction refers to various phenomena which occur when a wave encounters an obstacle.
- In classical physics, the diffraction phenomenon is described as the apparent bending of waves around small obstacles and the spreading out of waves past small openings.
- Similar effects occur when a light wave travels through a medium with a varying refractive index, or a sound wave travels through one with varying acoustic impedance.
- Diffraction occurs with all waves, including sound waves, water waves, and electromagnetic waves such as visible light, X-rays and radio waves.
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- Interference occurs when multiple waves interact with each other, and is a change in amplitude caused by several waves meeting.
- Unlike solid objects, two waves can share a point in space.
- In physics, interference is a phenomenon in which two waves (passing through the same point) superimpose to form a resultant wave of greater or lower amplitude.
- The effects of interference can be observed with all types of waves, for example, light, radio, acoustic and surface water waves .
- In constructive interference, the two amplitudes of the waves add together and result in a higher displacement than would have been the case if there were only one wave.
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- The microwave region of the electromagnetic (EM) spectrum is generally considered to overlap with the highest frequency (shortest wavelength) radio waves.
- It indicates that microwaves are "small" because have shorter wavelengths as compared to waves used in typical radio broadcasting.
- The boundaries between far infrared light, terahertz radiation, microwaves, and ultra-high-frequency radio waves are fairly arbitrary.
- This band is commonly used in radio astronomy and remote sensing.
- Microwaves overlap with the high frequency portion of the radio section of the EM spectrum.
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- Maxwell's prediction of the electromagnetic force was confirmed by Hertz who generated and detected electromagnetic waves.
- This means Maxwell's equations predicted that radio and x-ray waves existed, even though they hadn't actually been discovered yet.
- Across the laboratory, Hertz had another loop attached to another RLC circuit, which could be tuned (as the dial on a radio) to the same resonant frequency as the first and could, thus, be made to receive electromagnetic waves.
- The propogation of an electromagnetic wave as predicted by Maxwell and confirmed by Hertz.
- The apparatus used by Hertz in 1887 to generate and detect electromagnetic waves.