Q. To measure the speed of an approaching car a police officer shines
✅ 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.
Explanation by: Team MCQ Buddy
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.