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The electromagnetic waves in the air are radio waves. These waves are sent through an antenna (a metal conductor) and when the waves travel, it is a current of electrons wiggling their way through the air at the speed of light. When this stream finds the receiver, the signal/wave it bounces off the dish and into the feeder. The feeder translates the signal into sounds and words on a radio by sending the signal through a small coil of long wire (around an iron-like core) and into a speaker.

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How would society be different if never created?

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How would society be different if never created?

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If this device was never created we may not have most of the technology we have today. We definitely would not have the same type of radios or television. And because of these major technologies, we were unable to advance and make more and newer technology

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Depending on the antennas, ( FM or AM radios ) FM picks up the electric part of the wave, while AM picks up the magnetic part of the wave.

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The electromagnetic waves in the air are radio waves. These waves are sent through an antenna (a metal conductor) and when the waves travel, it is a current of electrons wiggling their way through the air at the speed of light. When this stream finds the receiver (another antenna), the signal/wave bounces off the dish and into the feeder. The feeder translates the signal into sounds and words on a radio by sending the signal through a small coil of long wire (around an iron-like core) and into a speaker.

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How would society be different if never created? (include details about what other things could take its place)

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How would society be different if never created? (include details about what other things could take its place)

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Life wouldn’t be too fun if the CRT TV was never created, if we had never made the television we would never have seen the presidential election of 1960 between Kennedy and Nixon, or when man first landed on the moon.

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Colors in middle - electron beams

Blue line - phosphor-coated screen

Dashed line - Shadow mask (metal plate with tiny holes)

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How does the device work? Explain using physics principles. 

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How does the device work? Explain using physics principles. 

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Phosphor: any substance that emits light when in contact with radiation, such as UV or a beam of electrons. When these electrons come in contact with the phosphor atoms, it gains energy. When the energy leaves the atoms, particles, or photons, are ejected, causing visible light. The shadow plate metal plate with tiny holes, placed so that the electron beam only illuminates the correct phosphors. Beams of electrons are pointed in certain directions and displays the correct colors because of the plate. (photoelectric effect)

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What is the overall design and what is the purpose of this device?

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What is the overall design and what is the purpose of this device?

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The cathode and a pair (or more) of anodes

phosphor-coated screen conductive coating inside the tube to soak up the electrons that pile up at the screen-end of the tube

In this diagram, you can see no way to "steer" the beam -- the beam will always land in a tiny dot right in the center of the screen.

This is a television and it televises things.