what is full form of Radar and Sonar
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Explanation:
radar (short for radio detection and ranging) A system for calculating the position, distance or other important characteristic of a distant object.
sonar (short for sound navigation and ranging) A system for the detection of objects and for measuring the depth of water.
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Answer:
If you have ever heard an echo, you’ll be familiar with the basic principle behind three similar technologies: radar, sonar and lidar.
An echo is the reflection of sound waves off of some distant object. If you shout in a canyon, the sound waves travel through the air, bounce off the rocky walls and then come back to you.
Sonar (SO-nahr) is the most similar to this scenario. This technology also relies on sound waves to detect objects. However, sonar is typically used underwater.
This sonar image shows the entrance to Portsmouth Harbor, N.H. Lower areas are in blue, higher areas in red.
NOAA/NOS/OFFICE OF COAST SURVEY
Medical technicians also may use sound waves to peer inside the human body (which is mostly water). Here, the technology is known as ultrasound. When bats, dolphins and other animals use sonar naturally, usually to find prey, it’s called echolocation (EK-oh-lo-CAY-shun). These animals send out a series of short sound pulses. Then they listen for the echoes to determine what’s in their environment.
Radar and lidar (LY-dahr) rely on echoes, too. Only they don’t use sound waves. Instead, these two technologies use radio waves or light waves, respectively. Both are examples of electromagnetic radiation.
Scientists made up the words radar, sonar and lidar. Each reflects a technology’s usefulness:
· Radar: ra(dio) d(etection) a(nd) r(anging)
· Sonar: so(und) na(vigation) (and) r(anging)
· Lidar: li(ght) d(etection) a(nd) r(anging)
Detection (or navigation) refers to locating objects. Depending on the technology, these objects may be underwater, in the air, on or below the ground, or even in space. Radar, sonar and lidar can determine an object’s distance, or range. For that measurement, time plays an important role.
Explanation:
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