Arun
Last Activity: 4 Years ago
Intensity of the wave is directly proportional to square of amplitude.
I ∝ a^2
I1/I2 = (a1/a2)^2
9/1 = (a1/a2)^2
a1/a2 = 3
a1 = 3a2
Ratio of maximum to minimum intensity by -
Imax / Imin = (a1+a2)^2 / (a1-a2)^2
Imax / Imin = (3a2+a2)^2 / (3a2-a2)^2
Imax / Imin = 4^2 / 2^2
Imax / Imin = 16 / 4
Imax / Imin = 4
Therefore, ratio of maximum to minimum intensity is 4:1.
Hope this helps you..