Q1267
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
AnswerD.
Ultra high frequency waves on it
Answer: Option C
Solution
Answer: Option C
Solution:
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.