  Both meson photoproduction and semi-inclusive deep inelastic scattering can
potentially probe transversity properties of the nucleon. We explore how that
potential can be realized dynamically. The role of rescattering in both
exclusive and inclusive meson production as a source for single spin
asymmetries is examined. Using a dynamical model, we evaluate the spin
independent $\cos 2\phi$ asymmetry associated with transversity of quarks
inside unpolarized hadrons, at HERMES kinematics. We also explore the effects
of rescattering on the transversity distribution of the nucleon.
