Q. Consider the following statements about Radar:
1.Radar is the acronym for Radio Detection And Ranging.
2.It is a specialized electronic system that uses infrared waves to determine the direction, distance, and velocity of target objects.
3.The radar signature is a measure of how detectable an object is by radar.
How many of the above statements are correct?
Answer: B
Notes:
Explanation: 1 and 3
Statement 1 is correct: Radar is the acronym for RAdio Detection And Ranging.
Statement 2 is incorrect: It is a specialised electronic system that uses radio waves to determine the direction, distance, and velocity of target objects. AD radars are used by the military to search, detect, identify, and help destroy aerial threats.
Statement 3 is correct: RCS, or radar signature, is a measure of how detectable an object is by radar, usually represented in square metres; larger the RCS, greater the detectability.
Source: IE
