i don't think so but trust me we will someday
Only if he has his radar gun on. Radar detectors are not cop detectors.
Having a radar detector will alert you when a Police Car with its speed radar is near. The Radar Detectors will produce an audible signal alerting you of this, and will do so far in advance of when you are able to see the Police Car.
If a car moves away from a radar source, the frequency of the returning radar signal decreases. This is due to the Doppler effect, where as the car moves away, the wavelength of the signal is stretched out, causing a decrease in frequency.
no
The K2 radar detector can be buil into a cars body.
a radar gun
It measures the time it takes for the radar pulse to go from the radar gun to your vehicle and back. The pulse is fairly constant so the radar gun is getting updates and by comparing the updates to the time it can determine speed.
I am not aware of any radar detectors that come with an alarm system for the car.
Car manufacturers probably will not build radar detectors into their cars like that since they wouldn't be able to sell the car in several states due to laws governing radar detectors. After market solutions are the only way to go but there are several discrete solutions on the market for someone who wants a radar detector that cant be seen.
If it's aimed at the wrong car - sure.
radar waves.
A beam of electromagnetic waves is bounced off the car