This image is not available for purchase in your country.

Policeman using radar gun to detect speeding car

Policeman using radar gun to detect speeding car

T602/0122

Rights Managed

This image is not available for purchase in your country.

Please contact your Account Manager if you have any query.

Credit

ADAM HART-DAVIS / SCIENCE PHOTO LIBRARY ADAM HART-DAVIS / SCIENCE PHOTO LIBRARY

Caption

Radar speed gun. A policeman uses a radar speed gun to see whether drivers are keeping within the local speed limit. When this gun is pointed at a moving object it displays the speed in kilometres per hour on a small screen on the back of the gun. The device works by bouncing a radar beam off the vehicle and comparing the frequency of the reflected signal to that of the initial output. Due to the doppler effect, the reflected frequency is lowered by a factor that depends on the speed of the moving object. The same effect is responsible for the sudden drop in the pitch of a siren when an ambulance passes a stationary observer.

Release details

Model release available. Property release not required.

 {{ i.shot_duration ? i.shot_duration + ' ' : '' }}{{ i.shot_uhd ? '4K ' : i.hires ? 'HD ' : '' }}{{ i.spl_number }} R{{ i.license }}

  • Add to board
  • Similar {{ mediaType(i) }}