The bubble raft shown nelow contains both high and low angle grain boundries. based on the image disscuss the whether the Equation, D$=$b$/($Theta$)$ holds True. Expliain.Fig. $3\mathrm{.}11$ Rafts of soap bubbles showing several grains of varying misorientation.

Note that the boundary with the smallest misoricntation is made up of a row of

disfocations, whereas the high$-$angle boundaries have a discrdered structure in which

individual distocations cannot be identified. $($After P$.$C$.$ Shewmon. Tramyformatiovas

in Metals, MeCiraw$-1$Hil, New York, $1060,$ from C$.$S$.$ Smith.$)$