Arun
Last Activity: 7 Years ago
Dear Ranjit
If I1 & I2 are the intensities of the fundamental and third harmonic, respectively then
I
1/I
3 = 81 [sin
2(

a/L)/sin
2(3

a/L)]
Now if the string is plucked at its mid point then a = L/2
hence
I1/I3 = 81
Regards
Arun (askIITians forum expert)