1 more question what is the doppler effect used for plEASE answer =)

Question

anonymous · Answer

Numoures of things, a fine example would be Sirens on police/ambulance cars. The sound is interped diffrently depending if the ambulance is approaching or moving away. But yet the sound remains the same.

anonymous · Answer

sorry i dint give u any options here are the options
measure the parallax of a star.
		
measure the brightness of a star.
		
measure the shift in the emission spectrum of a star.
		
measure the color of a star.

anonymous · Answer

Measure the shift in the emission spectrum of a star.

anonymous · Answer

ok thanks your really helping me out