ABSTRACT
The scattering cross-section at 2 MHz and resonant frequency of an air bubble of 3-
µ
m radius can be easily calculated from Equation (2.38) and Equation (7.1), assuming that the compressibility and density of air are 6.9
⋅
cm
/dyn and 1.3
⋅
g/cm
, respectively. Here, it is assumed that the compressibility term dominates so that the density term can be neglected. Also,
G
in the present case is >>
G
.
