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Isn't this cool?

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Radio waves have the longest wavelengths of all the electromagnetic waves

Radio waves are electromagnetic waves, not sound waves.

Radio waves are packets of energy with different types of wavelengths, similar to visible light waves, X-rays or gamma rays, however, they are longer longer.

Radio waves, like other electromagnetic waves are similar to ocean waves, and any other waves

The smallest radio waves are called microwaves

Radio waves can be used for broadcasting, communication satellites and mobile phones

Radio waves are like a series of repeating peaks and valleys

Radio waves are generated by electric charges undergoing acceleration,  for example, time varying electric currents.

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There is a chance radio waves can cause cancer from long exposure, for example, if you live in near a radio transmitter you may get cancer from too much exposure, but other then that there isn’t much danger created by radio waves and radar systems, radio waves are also the least harmful type of electromagnetic wave, which means other electromagnetic waves are more dangerous than radio waves.

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Radar is a detection (scanning) system that uses radio waves to regulate and decide the range, angle, and velocity of an object. Radar systems can be used in military bases for detecting incoming airplanes or ships from other countries (enemies). It is a system used to detect the area and distance of an object from the area where it is placed. Radar systems can detect things such as objects on the ground, tall buildings, and mountain peaks.

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Wave-guides: transmission lines

Duplexer: Allows the radar to collect new waves, and also transmit other waves at the same time

Threshold decisions: Comparing to the receiving signs,

Transmitter: emits radio waves in predetermined directions

Antenna: Moves the radio waves into directions

Receiver: Detects waves that are coming from objects

This is a diagram of how different parts of radar systems:

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Radar systems can measure the speed and number of cars on a road.

Radar was first used in 1904 by Christian Hülsmeyer.

Radar systems send (move) electromagnetic waves in pulses but not continuously.

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Here is an article by NASA on radio waves

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Here is an article by NASA on radio waves

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There's a video inside the article!

https://science.nasa.gov/ems/05_radiowaves

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https://www.softschools.com/facts/science/radio_waves_facts/2939/

https://kids.kiddle.co/Radio_wave

https://www.explainthatstuff.com/radar.html

https://www.livescience.com/50399-radio-waves.html

https://science.nasa.gov/ems/05_radiowaves

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Here is a video on how radar systems work:

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Here is a video on how radar systems work:

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https://www.youtube.com/watch?v=4rIHdcwlvlk