Sound Waves.
Doppler machines use ultrasound waves to measure the velocity of blood flow in the body. These waves are high-frequency sound waves that bounce off tissues and blood cells to create Doppler images that show the movement and speed of blood flow in real time.
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.
They are transverse waves.
They are tranverse waves.
Meteorologists use a special kind of radar called Doppler radar, which is based on the principle of measuring the shift in frequency of the radar waves that are reflected off precipitation particles. This shift in frequency allows meteorologists to detect the motion of precipitation particles, which is useful for tracking severe weather such as thunderstorms and tornadoes. Doppler radar helps meteorologists to provide accurate and timely weather forecasts and warnings.
Usually Doppler radar is used.
visible waves visible waves
Radio waves.
transverse
Transverse wave
compressional waves they swerve up and down
Johann Doppler (brother), Katharina Doppler Müllbauer (sister), Anna Doppler (sister), Theresia Doppler (sister)