Third Condition No beats because listener is moving far from
both sources.Specital Notes :
If any listner moving in between two stationary sound sources of
identical frequency, beats phenomenon willbe observed by
listner.The wave length of sound wave produced by souce only &
only depends on motion of source. First changethen N change if
source is moving.If source is at rest s is constant & directly
N changes because its velocity of motion which is given by.
extra waves per sec.0
LV
= where0
0 NV
=
Optical Doppler effect.(1) Einteins theory of relativity is used
to work out Dopper shift.
According to Einstein if distance between (S) & (O)w.r.t.
time is
(a) 00 (+ve)
(-ve)
(decrease) = Special lines shifted towards violet end voilet
shiftApparent optical frequency
v1C
'
v1C
+ =
(b) >> 00 (-ive)
(-ive)(inreases)
+
=
Cv1Cv1
' = Special lines towards Red end = Red shift or Blood shift
If V = Relative velocity of source & observer(a) Wave length
shift in optical DE
