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Radar is the use of a transmitted electromagnetic pulse and the evaluation of reflections to determine what is in the signal's field. Sea water conducts electricity pretty well, and anything that conducts electricity like that will absorb the electromagnetic energy of the radar (as well as reflect some of it) and not allow it to penetrate it to an significant degree. It would be like trying to see through the densest fog you've ever been in at night while using a flashlight. Almost nothing more than a couple of feet away will be visible. The dielectric constant of water is not good for RF propagating but Air is. Air has a very good dielectric constant of RF properagation, as does a vacuum. However water is good for propagating sound will although it propagates much slower the RF weaves, the distance that sound waves (which is a pressure waves) travel is vastly longer then Radio Waves (which is electromagnetic waves) would in water. For this reason SONAR is used for echo location in place of RADAR underwater, and it is worth noting that because SONAR waves propagate slower the radio waves a lot of Radar Techniques have already been proven on SONAR application before they are on RADAR one as the time base is slower. (Richard Rudd-Orthners)
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Who uses sonar and a radar?
Sonar and radar's are used by the military, research groups, reconnaissance missions, searches for dead bodies and much more. It is a widely used technology.
What is the smallest object radar can pick up?
The smallest object most radar can pickup is a bird. Radar used by air traffic control and civilians is less accurate than that of the military.
Underwater detector World War 2?
A Hydrophone, which is a waterproofed microphone, is used to detect sound waves in the water. This passive system was used to listen for enemy ships and submarines.SONAR was used as an active system, in quite the same way as radar, emitting a pulse of sound, and listening for the return echo. Naturally you will let the enemy know you are there!
Why does a magnet work under water?
Interesting question. The answer is maybe - it depends on the construction of the electromagnet. the key is the electromagnet must be water proof, and the wiring used to create the magnet must be insulated from water - if this is not done, then current will flow through the water, which will decay the effectiveness of the electromagnet, along with robbing it of strength due to a decrease in current through the magnet.
A pump is not used to raise groundwater to the surface in areas where artesian wells are located becasue the water in artesian wells is?
under high pressure
What is the radar for?
Radar is used to detect concentrations of water droplets in the atmosphere, which tells meteorologists where rainfall, snow and hail are occurring.
Which instrument is used in submarines to observe the surface of water?
A Periscope or Radar
Why microwave is not used in radar?
Microwave IS used in RADAR.
What are radar waves used for?
radar
How can you get a cat used to water?
you cant
What does below the radar mean?
Radar is a technology which detects objects by bouncing radio waves off of them. It was brought into widespread use during the second world war as a way of discovering oncoming aircraft. However, low-flying aircraft could not be detected by radar, hence they flew "under the radar", that is, low enough not to be detected. Something which is "under the radar" is therefore something which cannot be detected. Often it is used for something which is too small or apparently insignificant to be detected by whatever means are being used to detect it.
Why can sonar systems never be used in space?
because they are used for under water sounds and a radar is used in space. Sonar means SOund Navigation And Ranging for underwater. Radar picks up radio waves for above water including space.
What is the name of a World War 2 device used to spot planes?
Radar : radio detection and ranging .
What is a dopppler radar?
a radar used by meteorologists
Can radar detect?
Doppler radar is used to measure speed, not temperature.
What kind of radar is used to record tornado data?
Usually Doppler radar is used.
What do radar balloons do?
This could mean:A radar attached to a balloonA balloon used by a radar for calibration
