A

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Q. To measure the speed of an approaching car a police officer shines

  • (A) Light waves on it
  • (B) Microwaves on it
  • (C) Radio waves on it
  • (D) Ultra high frequency waves on it
  • Correct Answer - Option(C)
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  • Filed under category Physics
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Explanation by: Admin
Radar, which stands for radio detection and ranging, is a system that uses reflected radio waves to detect objects and measure their distance and speed. For example, police use radar to calculate the speed of cars.

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