Select the quantity from column II which changes with respect to the case when observer, source and air are stationary. Consider motion along line joining source and observer.
Column-I | Column-II |
(i) Source moves, observer stationary | [A] Frequency of sound received by observer |
(ii) Sound reaches observer after reflection from fixed end | [B] Speed of sound w.r.t. medium |
(iii) Observer moves, source stationary | [C] Wave-length of wave in medium |
(iv) Wind blows, source and observer stationary | [D] None |
Text Solution
Verified by ExpertsCHECK THE SOLUTION.
Ans.
(i) [A],[C]
(ii) [D]
(iii) [A]
(iv)[C]
Sol.
According to Doppler effect
v = 
v 0
where symbol have their usual meaning. Also, when source moves towards or away from listener, frequency changes due to change in wavelength
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