Question

------------ are waves used by cops to test the speed of your car with radar
a)uv
b)infrared
c)radio
dmicrowaves

Answer 1

Answer:

radio waves are used by the cops to measure speed

Answer 2

Radio waves are waves used by cops to test the speed of your car with radar.

What are radio waves?

• Radio waves are a kind of electromagnetic radiation with frequencies in the electromagnetic range longer than infrared light.
• They are created by electric charges going through speed increases, for example, time fluctuating electric field.
• In current technology, radio waves are widely employed for fixed and mobile radio transmission, broadcasting, radar, and other navigation systems.
• The cops utilise radar to determine how fast cars are travelling. The Doppler effect is used in radar, however, instead of sound waves, radio waves are used.

Therefore, Radio waves are waves used by cops to test the speed of your car with radar.