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plz solve the question shown below
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Asked by sarveshvibrantacademy | 19 Mar, 2019, 11:03: AM
answered-by-expert Expert Answer
As we move the tube starting from minimum intensity , we get maximum intensity at some position and
moving further again we get minimum intensity so on.
 
In figure let us denote the minimum intensity as  ' o '  and maximum intensity as ' x '. 
 
If we get 10 maximum and then reaches the final minimum for 5 cm tube movement, then as shown in figure
we get a path difference of 10 cm between the starting minmum and final 10th minimum. 
 
we need to consider the path difference 10 cm , because of two limbs,  path difference becomes 10 cm when tube is moved by 5 cm.
 
Hence one minimum to subdequent minimum distance = [ 2(n+1) -1](λ/2) - [2n-1] (λ/2) = λ = 1 cm   
 
Hence wavelength of sound is 1 cm .
Answered by Thiyagarajan K | 19 Mar, 2019, 03:20: PM

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