Depends on the method used.
In RADAR, they use the Doppler effect, coupled with specific band waves. the k( 20 - 40 GHz) range, the x range(8.0 - 12.0 GHz), and the Ka range(26.5 - 40 GHz). They also tend to use the IR range.
There is also the LADAR system. I was unable to find the wavelengths of the laser they use, but whats important is they use a focused pulse laser system that sends out about 100 pulses in 3/10ths of a second. This system does not use the Doppler effect, but some other more complex algorithms to calculate more than just speed.
Everything except visible light (cosmic, X-rays, radio, infra-red, ultra-violet, etc.).
Consider a blind person, he cannot see sun but he can tell if he is standing in sun or shade, how? Because he can feel infrared waves heating up his/her skin. Similarly there are certain substances that are sensitive to certain kind of waves, there can be an arrangement to detect these like a circuit to detect radio waves and so on.
Ears detect sound waves, which are mechanical vibrations that travel through a medium such as air, water, or solid materials. These waves cause the eardrum to vibrate, which is then translated into electrical signals by the inner ear and sent to the brain for processing and interpretation as sound.
They are transverse waves.
They are tranverse waves.
speeding tickets
visible waves visible waves
Radio waves.
transverse
Transverse wave
compressional waves they swerve up and down
This question is far too vague. Explain what kind of kits you mean and for which vehicles.