They use radar.
You can detect the speed of a ball by using tools like radar guns, speed cameras, or by calculating the speed based on time and distance measurements. These methods can provide an accurate measurement of the ball's speed at a given moment.
Speed cameras is a shortened version for Speed Trap Cameras which are fixed or mobile cameras used by the police or councils to take pictures of vehicles travelling above the speed limit and thereby prosecute them for speeding
There are speed cameras now in most places that are busy intersections. Speed cameras are expensive and are usually not found in small towns or small municipalities.
they caclate your speed
No
Red light cameras are usually high speed video cameras that use ambient light.
The infrared spectum since this is attributed to heat.
The average set of security cameras offer picture quality that is good enough for the intruder captured on the camera to be identified. This is the point of CCTV cameras. Some of these cameras might be waterproof or detect motion.
Yes, cameras do detect ninjas in DV8: Exile by removing their stealth capability when they are in range, exposing them to attack. Cameras have a pre-set range which can be increased by upgrading them.
By definition you can't detect them, or at least not without sophisticated electronic devices; and then only if the camera's output is transmitted wirelessly or the device is otherwise emitting detectable electromagnetic radiation.That's the point of them.There are devices supposedly able to detect roadside speed-cameras but it's easier, more reliable and safer to stick to the speed-limit!
over 20 km/h over the speed limit
"Most smart phones do carry high speed video cameras. However, some do not, you have to look at the specs on the cameras just to make sure you are not getting messed with."