Source Detector Situations

 

1.    One source and one detector both fixed : b = 10 log (I/Io) , I = Pav/4pr2

 

  1. One source and one detector with relative motion : Doppler effect or b

 

3.    One source and two detectors all fixed : b2 b1 = 20 log (r1/r2)

 

4.    One source and two detectors with relative motion : Doppler effect or b

 

5.    Two fixed sources and one fixed detector : interference DL = (l/2p) f

 

6.    Two fixed sources and one moving detector : counting maxima and minima

 

How do you distinguish between the Doppler effect and b ?

Frequencies Distances