A radar which ascertains the location and presence of Enemy's aircraft use–

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(b) Radio waves — RADAR stands for Radio Detecting And Ranging. It is based on the use of radio waves. Radars send out electromagnetic or radio waves. The signals are sent out as short pulses which may be reflected by objects in their path, in part reflecting back to the radar. When these pulses intercept precipitation, part of the energy is scattered back to the radar.

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(A) Light waves

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(C) Sound waves

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(D) Transidental waves

A radar which ascertains the location and presence of Enemy's aircraft use–

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