[Solved] To measure the speed of an approaching car a police officer shines –

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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
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.

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