I'm not sure how so yeah....
2007-10-25 16:26:42 · 11 answers · asked by thepizzaboy95 2 in Science & Mathematics ➔ Chemistry
Basically, it plots where the object is at a given point in time, then when it picks the same object up again (on the next sweep). It calculates it's new position and the time it took to get there, hence they can calculate the speed.
2007-10-25 16:30:38 · answer #1 · answered by Petero 6 · 0⤊ 0⤋
A laser goes from the radar to your vehicle (or whatever) then bounces back into the radar gun, it has to do with the speed the laser travels and the time it takes to go to the object and back, you can't do anything to avoid a radar gun really, even radar detectors may not work, they detect if a policeman is using the gun but some have the gun turned off until they see you coming and by then you can't turn around If you want more info just type your question in google
2007-10-25 23:33:04 · answer #2 · answered by B B 2 · 0⤊ 0⤋
radar (RAdio Detection And Ranging) is *used* to determine the speed of objects by bouncing sound waves (inaudible to humans) off the object.
The moving object either absorbs or adds energy to the wave, speeding it up or slowing it down. From this parallax, a simple calculation can be used to find the speed from the change in the wavelength of the sound wave.
2007-10-25 23:28:14 · answer #3 · answered by Anonymous · 0⤊ 1⤋
It fires the rays along and when a speeding object goes through the rays it measures the speed the reflected beams have been disturbed by.
2007-10-25 23:30:16 · answer #4 · answered by Anonymous · 0⤊ 0⤋
The Doppler shift of the returning signal is used to calculate relative speed.
2007-10-25 23:30:33 · answer #5 · answered by Anonymous · 0⤊ 0⤋
The emitter shoots out a radio wave, which hits the object, then reflects back into a detector. SLAM!
2007-10-25 23:30:14 · answer #6 · answered by Citizen Slam of the Chub Guard 2 · 0⤊ 0⤋
Like a beam of light reflecting off a mirror they measure the amount of time it takes to return
2007-10-25 23:29:33 · answer #7 · answered by CJ 2 · 1⤊ 0⤋
the laser it emits reflects back into it and based on the speed of the object its hitting it can read velocity and speed,
2007-10-25 23:29:57 · answer #8 · answered by Anonymous · 1⤊ 0⤋
Doppler effect. The waves are close together if its fast and farther apart if its slow.
2007-10-25 23:29:59 · answer #9 · answered by Victoria. 6 · 0⤊ 0⤋
sound wave hits obeject and using time and distance, u can calculate how fast it's going. distance/ time= velocity or how fast obejct is going.
it's basic physics.
2007-10-25 23:30:19 · answer #10 · answered by aerothen 2 · 0⤊ 0⤋