Sound WavesHard
Question
Three coherent sonic sources emitting sound of single wavelength λ are placed on the x-axis at points 
, (0, 0), 
. The intensity reaching a point 
from each source has the same value I0. Then, the resultant intensity at this point due to the interference of the three waves will be :-
, (0, 0), . The intensity reaching a point from each source has the same value I0. Then, the resultant intensity at this point due to the interference of the three waves will be :-Options
A.6I0
B.7I0
C.9I0
D.5I0
Solution
Source (1 & 3) have no path differece, so no phase difference
So intensity by source 1 & 3
Inet (1 & 3) = 4I0
Inet = 4 I0 + I0 + 2
cos 
Inet = 7I0
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