The radar system associated with the automatic doors at a local grocery store uses 10.5 gigahertz radiation. If the door is to open for a person walking towards it at 1 meter per second, which Doppler shift must the radar system be able to detect:
W) a red shift of 2 hertz
X) a blue shift of 35 hertz
Y) a red shift of 160 hertz
Z) a blue shift of 1.8 hertz
✔️Answer:X) A BLUE SHIFT OF 35 HERTZ
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