WONDER #1558: How Do Police Know How Fast You’re Going?
Question 1 of 3
What does radar stand for?
- Radio Detection and Ranging
- Really Awesome Detector for Auto Racing
- Racing Autos Detected and Ranged
- Radical Auto Detection and Registration
Question 2 of 3
Lidar machines use what modern technology?
- light bulbs
- nuclear fission
- solar power
Question 3 of 3
Radar guns detect speed by making calculations based upon what scientific principle?
- gravity field
- Doppler shift
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