1506Every Day ScienceMedium
To measure the speed of an approaching car a police officer shines?
Aultra high frequency waves on it
Blight waves on it
Cradio waves on it
Dmicrowaves on it
Correct answer
C. radio waves on it
Explanation
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.