Radar Systems by Amara Khin Lizzie https://padlet.com/lizzieamarakhin26/7hldv292z1getsr5 My Summative On EM Spectrum Technology en-us 2020-05-13 05:48:06 UTC 2020-05-14 08:27:33 UTC hello@padlet.com https://padlet.net/icons/png/1f60a.png What Are Radio Waves? lizzieamarakhin26 https://padlet.com/lizzieamarakhin26/7hldv292z1getsr5/wish/569189606
  • 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.
    • ]]>     2020-05-13 05:54:39 UTC https://padlet.com/lizzieamarakhin26/7hldv292z1getsr5/wish/569189606     Radio Waves lizzieamarakhin26 https://padlet.com/lizzieamarakhin26/7hldv292z1getsr5/wish/569203366 2020-05-13 06:07:04 UTC https://padlet.com/lizzieamarakhin26/7hldv292z1getsr5/wish/569203366 What are radar systems? lizzieamarakhin26 https://padlet.com/lizzieamarakhin26/7hldv292z1getsr5/wish/569205273  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.]]> 2020-05-13 06:08:34 UTC https://padlet.com/lizzieamarakhin26/7hldv292z1getsr5/wish/569205273 Here is an article by NASA on radio waves lizzieamarakhin26 https://padlet.com/lizzieamarakhin26/7hldv292z1getsr5/wish/569219701
    There's a video inside the article!

    https://science.nasa.gov/ems/05_radiowaves]]>     2020-05-13 06:20:35 UTC https://padlet.com/lizzieamarakhin26/7hldv292z1getsr5/wish/569219701     Are radio waves dangerous? lizzieamarakhin26 https://padlet.com/lizzieamarakhin26/7hldv292z1getsr5/wish/569244746 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.]]> 2020-05-13 06:38:09 UTC https://padlet.com/lizzieamarakhin26/7hldv292z1getsr5/wish/569244746 Resources lizzieamarakhin26 https://padlet.com/lizzieamarakhin26/7hldv292z1getsr5/wish/569988656
    ]]>     2020-05-13 13:07:07 UTC https://padlet.com/lizzieamarakhin26/7hldv292z1getsr5/wish/569988656     How Do Radar Systems Work? lizzieamarakhin26 https://padlet.com/lizzieamarakhin26/7hldv292z1getsr5/wish/569996302
  • 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:
    ]]>     2020-05-13 13:09:57 UTC https://padlet.com/lizzieamarakhin26/7hldv292z1getsr5/wish/569996302     Radar System lizzieamarakhin26 https://padlet.com/lizzieamarakhin26/7hldv292z1getsr5/wish/570054803 2020-05-13 13:31:01 UTC https://padlet.com/lizzieamarakhin26/7hldv292z1getsr5/wish/570054803 Here is a video on how radar systems work: lizzieamarakhin26 https://padlet.com/lizzieamarakhin26/7hldv292z1getsr5/wish/570057631 https://www.youtube.com/watch?v=4rIHdcwlvlk]]> 2020-05-13 13:32:01 UTC https://padlet.com/lizzieamarakhin26/7hldv292z1getsr5/wish/570057631 Fun Facts! lizzieamarakhin26 https://padlet.com/lizzieamarakhin26/7hldv292z1getsr5/wish/570066180
  • 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.

    • ]]>     2020-05-13 13:34:53 UTC https://padlet.com/lizzieamarakhin26/7hldv292z1getsr5/wish/570066180     Radar Picture lizzieamarakhin26 https://padlet.com/lizzieamarakhin26/7hldv292z1getsr5/wish/572016644 Isn't this cool?]]> 2020-05-14 08:27:06 UTC https://padlet.com/lizzieamarakhin26/7hldv292z1getsr5/wish/572016644