S, O & W represent source of sound (of frequency f), observer & wall respectively. V O , V S , V D , V are velocity of observer, source, wall & sound (in still air) respectively. V W is the velocity of wind. They are moving as shown. then match the following: where f r = 
Column-I | Column-Il |
(a) The wavelength of the waves Coming towards the observer from source. | (p) (V - VW - VD)/fr |
(b) The wavelength of the waves incident on the wall. | (q) (V - VW - VO)fr /(V - VW - VD) |
(c) The wavelength of the waves coming towards observer from the wall. | (r) (V - VW + VS)/f |
(d) Frequency of the waves (as detected by O) coming from wall after reflection. | (s) (V + VW - VS)/f |
Text Solution
Verified by ExpertsCHECK THE SOLUTION.
→ (r); → (s); → (p); → (q)
Sol. Find all speeds w.r.t. wind and apply doppler effect.
The wavelength of the waves coming towards the observer from source = (V - V W + V S )/f
The wavelength of the waves incident on the wall
The wavelength of the waves coming towards observer from the wall = (V - V W - V D )/f r
Frequency of the waves (as detected by O) coming from wall after reflection= (V - V W - V O )f r /(V - V W - V D )
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