application of advanced doppler effect questions

1. Sonic Boom: It is caused by object moving faster than sound
2. weather - radar travels at a certain speed at sea level thru air. Moisture in the air changes this speed by reflecting back to antenna. calibrating to the right frequencies, this change in return can map out the moisture pattern thus giving a picture of storm cells in the air.
3. deep space - objects moving away give us the red shift as light waves are decompressed in trailing, objects moving towards us the waves are compressed so a higher frequency and we see "blue shift"
sher mohammad
askiitians