52. Solid solution strengthening and different interactions

This video deals with
1. Elastic interactions between solute and solvent dislocations
2. Position of solute atoms with respect to an edge dislocation
3. Modulus and Electrical interactions
4. Chemical interactions and Suzuki effect

[@user-un3on3vp7x]

cannot understand why the power of the ra is 2 but not 3 in the misfit volume

[@user-pr1fp1wk3l]

its a typo