Points : Definition, Construction (Parts of Radar), Working of Radar, Determination of Distance, Uses of Radar
Definition
Radar stands for Radio Detection and Ranging.
Construction (Parts of Radar):
Radar consists of following parts.
• Transmitter
• Receiver
• Indicating devices
Working of Radar:
The transmitter generates very high frequency electromagnetic waves (above 600 Mhz) in any desired direction with the help of a concave antenna. The radar waves reflected back when they strike a distant object. The reflected waves of radar strikes the radar antenna, these signals are fed to desired indicating devices.
Determination of Distance:
By knowing the wave velocity the distance of the objet from the radar can be found.
Uses of Radar:
• It is used to beware of surrounding ships, ice bergs hidden rocks under water and hills hidden by mist and cloud.
• It is used for air traffic control.
• It helps in navigation in low visibility.
• It helps to detect enemy planes.
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