Question : Radar is used to
Option 1: locate submerged submarines
Option 2: receive signal from radio receivers.
Option 3: detect and locate distant objects.
Option 4: locate geostationary satellites.
Correct Answer: detect and locate distant objects.
Solution : The correct answer is detect and locate distant objects.
Radar was discovered by Hoyt Taylor and Leo C. Young. It works by transmitting radio waves and distance of the object is calculated by time taken by the radio waves which are reflected back. There are 3 types of radar-
- Short range radar- upto 50 metres
- Mid-range radar- upto 100 metres, and
- Long range radar- upto 250 metres.
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